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Hello Omasan,

Thanks for reading my posts and having interest in more advance laptop repairs.
Unfortunately, we only recommend ebooks to engineers since they can easily understand the basics.
We have various advance laptop motherboard repairs ebooks. You can email us at: internetinfowealthtech@gmail.com
Hope for hear from you again. Thanks

if you need the ebooks, please kindly visit the website on the post or send email to: internetinfowealthtech@gmail.com

We have an ebook called Laptop Bible for beginners. just request for it.

[center][size=18pt]SOME COMMON LAPTOP REPAIR QUESTIONS[/size][/center]

Q: Would love to know how you diagnose motherboards on a component level. What tools do you use?

A: I find it is very hard to explain this. actually, it is very simple and can be described in two words: current and signal. read the current change during booting tells you where the machine stopped. check the signals on the different part of motherboard tells what is wrong or what may missing.

Tools are: smd rework station, bga rework station, power supply has current meter. all the rest tools you can find in any radio tv repair shop. of course all the datasheets for the components, especially the schematic diagram, you will find it much difficult without it.

Q:What are common faults on mainboards?

Do certain components fail? Is there a trend as to which parts fail quite often?

A: Different maker/model has different common fault. Toshiba S1 is vga chip, and can’t be repaired(well, almost can’t be repaired because the pcb quality is not very good so successful rate is very low).

HP DV2000, 6000, 9000, Compaq v3000, v6000, dell 1210, all those use nvidia chips have problem on vga chip or north bridge. easy to repair but have to make fan keep spinning after repaired, otherwise will break down in 1 or 2 week again.

hp nx5000, cpu pwm chip dry joint. acer 290, cpu pwm dry joint.
hp dv1000, Compaq m2000 protection circuit easy to blow up.
IBM t40 vga dry joint problem.

These are just few of them. every machine has its own common fault. but dry joint is the common problem for all machines. Motherboard repair is not as difficult as people thought, I think much easer than repair a tv.

Q:Dell 1525 Inspiron that says system does not recognize the installed battery this system will not charge the battery.

A:Charging battery in Dell laptop involves two major chips: EC(or someone call it super IO), PWM chip for battery charging. BIOS has no part of charging. Battery communicate with EC through SMB(system management bus??) and EC controls charging PWM. Fix charging problem is very hard in laptop repair, you must fully understand schematics, where all the signals come from and where to go.

Today’s laptops are less and less with programmed EC, Dell 1525 has no programmed EC so it can be replaced with same model.

Q: How I fix a DV6 with power problem. The problem of machine is it cannot power up at all.

Doing routine check:

1. system power: 3V, 5V all presented – OK
2. NBSWON signal: 3. 3V presented – OK
3. press power button, NBSWON pull down to 0V, OK
4. check DNBSWON while press power button, no response. – problem.

in here I made a mistake, I didn’t pay attention of the voltage of DNBSWON, this mistake waste me the next few days time. It should be 3. 3V, but only about 1V.

Change EC as usual, because I thought the EC has problem. Then the big trouble comes – it auto power up once I plug in the power but stop in 0. 04A current. Check and find no S5_ON signal, which indicate south bridge has problem, so change south bridge. But still same problem and still no S5_ON. I find that the EC I change is kb3926A rather than kb3926C. In most case, this is no problem but in very rare occasion…

So I find a 3926C and put on. Now the motherboard is back to the same problem while I first start to check! So I change a wrong EC and this time I change a correct one, and also EC has no problem!

Because EC will start to read bios once the power plug in(not as people think, once you press power button). I check BIOS chip, BIOS_CS should have a continue wave form but it just one straight line. BIOS chip is faulty, I replace the BIOS chip and it works perfect.

Laptop Motherboard Ic chip Removal Process

How to replace tiny ic chips in a Laptop motherboard.

Look at Burnt ic chip on the motherboard.
The laptop would not turn on.
Take a closer view of the burnt ic chip…
Bad chip needs to be replaced.

Learn how to replace bad ic chip on the laptop motherboard
IC chip is soldered to motherboard and the laptop now works fine.
if a chip is dead just replace it!!.

Advance ic chip removal process

How to remove ic chip with 102 pins.

1st) Remove the chip
The chip is removed then find the same chip from another motherboard.
Place Flux around the new chip in order to help with the soldering.
The contacts need to be free of solder so the pins can’t short. Use the soldering iron to
brush away excess solder from the joints.
The old chip is removed. The new chip is now in place.

*Ensure that the version number on the old chip is the same as the new chip.


If you liked this, please share and order for the complete eBook. Thanks!
For more laptop repair ebook, contact: internetinfowealthtech@gmail. com

This is an extract from the complete ebook: [size=18pt]LAPTOP MOTHERBOARD FAULT FINDER[/size]. The complete eBook provides a comprehensive overview of how to find and repair laptop common faults. This eBook in fully packed with over 125 full coloured pages with pictures for easy understanding to both the highly-tech and low-tech individuals. Great for beginners.

Below are some of the knowledge contained the eBook.
• Laptop Motherboard Component Overview
• Troubleshooting Laptop Motherboard Problems
• How to replace tiny sound ic chips in a Laptop motherboard
• Checking Voltage and Short Circuits with Multimeter
• Testing for Backlight or Inverter Failure
• Recovering Laptop Hard Drive Files With A USB Shell
• How To Fix Failed Nvidia Chip
• And Much More

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If You're Sick And Tired Of The Lockups, Bootup Failures, Upgrade Problems, Those Slowdowns,
Drive Failures, Memory Low, Video Problems. . . ?
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{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}
Join now and unlock your technical hurdles!

FREE LAPTOP REPAIR EBOOKS ALSO AVAILABLE ON DEMAND

Here's How To Replace A DVD Drive In Your Laptop[center][/center]

Replacing a DVD drive in a laptop is very simple. Even if you don't have a lot of technical
expertise this is something that you can do. There are no screws involved or opening up of
the computer case. This is because most laptops all use modular drives that pop right out.

A DVD burner is the drive that allows you to write data or video/audio files on a DVD
disk. The amount of information that can be written to a DVD is typically 4.7 GB.
However, double-layer DVD burners can write up to 8.5 GB of data on a disk. Devices
with a LightScribe-enabled optical drive allow you to burn DVD labels as well.

An installation of a new DVD burner on your laptop may be required due to the failure of
the original hardware or as an upgrade from a CD/DVD-ROM (read only) drive. Get a
replacement from the manufacturer.

Laptops don't have big open cases that will fit any DVD drive you buy. The cases for the
drive are somewhat proprietary to the manufacturer of the laptop. Call your manufacturer
and give them your exact model and serial number to order the right sized DVD drive.

Shutdown the laptop and make sure it is completely powered off. Disconnect the plug from
the battery and set the laptop on a flat dry surface. Turn the laptop over. You may have to
check your manual but most laptops have a button to push or slide to release the drive.
Push the drive straight out and remove it from the laptop. Insert the new drive in the
reverse way you pulled out the old drive.

Insert an edge of a paper clip into the emergency eject hole of the DVD drive to open it.
Gently pull out the disk tray. Locate two screws (one on some laptop models) on the back
laptop panel that secure the DVD drive. You may need to consult your laptop manual for
the information specific to your laptop.

Unscrew the screws and carefully pull the DVD drive out of the laptop. Insert the DVD
burner on the place of the old drive and slide it all the way down. Complete the hardware
installation by securing the DVD burner with the screws you removed earlier.

Turn the laptop right side up and turn the power on. The DVD drive will basically be
automatically found and work either fully or with basic functionality. Install any drivers by
inserting the CD that came with the drive or by downloading them from the website.
Installing the driver may add advanced functionality that the older drive did not have.

Its that easy to remove the old Dvd Drive and replace it with a newer one. Whenever
possible, get your hands on a laptop and try this yourself. Its both easy and rather fun as
well.

Power is knowledge and using your knowledge the right way can bring you many financial
blessings. Don't tamper with a laptop that's under warranty. Grab an older model and then
Practice...Practice...and Practice some more.

If you like the post, please share. Thanks
email: internetinfowealthtech@gmail.com

Please visit: [url]internetinfowealthtech..com[/url] for more details on Laptop troubleshooting and repairs
You can also personally request for a particular laptop ebook FREE when you order for one

Recovering Laptop Hard Drive Files With A USB Shell[center][/center]

The worst thing that can happen to most laptop users, aside from the loss of the whole laptop, is hard drive failure. The hard drive holds all of your data, files, and all your e-mails and contacts if you use Outlook, Eudora, or any other non-portal based e-mail. But I'm sure many more laptops have gone to the recycling facility with live hard drives than dead hard drives. If you have any files you value on your hard drive that aren't backed up, you should buy a USB shell and attempt to recover the data. Hard drive data recovery is thought to be an arcane art, requiring expensive equipment and a high level of technical skill, but all of that only comes into play if the onboard electronics or the motor have failed. In that case, the drive platters are removed from the metal case in a special clean room, and the data is recovered by reading it off on a universal reader.

{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}

Most laptop owners are still very foggy as to where their data resides and consider the whole lower part of the laptop (everything except the screen) to be part and parcel with the hard drive. In reality, laptop hard drives are 2.5" wide, about 4" long and about a quarter inch thick. They weigh a couple of ounces, and can normally be accessed by removing a single screw from the laptop, as shown above. You should always unplug the laptop and remove the battery before attempting to do any repair work. After removing the single screw, you can see the 2.5" laptop hard drive installed in its cage. This hard drive is an IBM Travelstar, perhaps the most common hard drive used in laptops the past couple years. Because it's an older laptop, there's no shock mounting for the drive, little rubber washers that have become a popular way to partially shield the hard drive from the vibrations that can cause head crashes, in which case you can't recover the data with a million dollar lab.


Most laptops use 2.5″ hard drives. It’s either IDE or SATA hard drive and you will see the difference in the following pictures.
2.5″ IDE HARD DRIVE
The IDE hard drive connector has two rows of pins.

2.5″ SATA HARD DRIVE
The SATA hard drive has two flat connectors. One for data and one for power.


Purchase an external USB enclosure for 2.5″ hard drive.
If you have an IDE hard drive, you’ll have to purchase an IDE enclosure.
If you have a SATA hard drive, you’ll have to purchase a SATA enclosure.
IDE and SATA enclosure are NOT interchangeable.

{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}

The next step is to remove the whole cage from the laptop, which involves pulling back on the cage to free the drive's IDE interface from the laptop connector. You can see that the drive cage is held from lifting by two metal tabs, and that the screw that held the plastic lid on the drive bay went all the way through and secured the cage in the laptop. That's all that held it together, one screw, and it's a typical arrangement. It turns out that removing the old hard drive from the cage, once it's out, is generally a bigger job than removing the cage from the laptop, because there are four screws involved and they are often over-tightened and strip when you try to remove them. But it's not necessary to take it apart any further if all you want to recover your old files.


Here is the new USB 2.0 interface (IDE) that came with the Sabrent hard drive enclosure. The interface is really all you need to gain access to the old hard drive, if it's healthy, and recover your data. The kit comes with software from Mac users as well as Windows based machines, but modern operating system versions don't even require the software. They'll just find the new USB hardware when it's plugged in, recognize that it's a hard drive, and allow you to recover your files as long as the file system types were compatible. I'm holding the interface card over the aluminum enclosure in which you could install the drive if you wanted to use it as a permanent external hard drive.


{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}


But when I started taking the screws out of the cage, three out of four fought me and the fourth stripped, despite the fact I was using a high quality screw driver. It would be easy to bend and break the remaining tab off to remove the cage, but why bother, when the only point of the job is to recover some old files? So I plugged the interface on (to the right), then set the whole thing down on my table with the new laptop and plugged it into the USB 2.0 port. You can see that the little green LED on the drive is lit and active, if you have good eyes and a better imagination.


Immediately after plugging in the USB cable, Windows XP picked up on the drive, and asks what you want to do with it. Choose "Open folder to view files using Windows Explorer" and you'll gain access to all of the old folders in your hard drive. You can copy or drag them anywhere onto your new laptop hard drive, and your data recovery job is complete. If the LED doesn't light up, you could be plugging the USB into an old port that doesn't source the 500 mA required, or the interface could be bad out of the box, or the drive could really be dead. If you don't hear the drive spin up, you can try picking it up gently, a few inches over the table, and try rocking in slowly to see if you can feel the centripetal force of the disk spinning.


In the 2005/2006 time frame, laptops started changing over from the older IDE (PATA) hard drives to the newer SATA hard drive. The only difference, as far as the user is concerned, is that the SATA drives are faster and have a different connector. The drives are otherwise identical, and the SATA drives often cost less in the larger capacities as they are more common today. Since the SATA interface only requires a few wires (serial vs. parallel bus), ribbon cables aren't required and a more flexible and robust connection is possible. The picture to the right shows a SATA drive installed in the laptop bay, and thanks to the rubberized shock mounting around the bay and on the cover, it simply sits tightly in place - no screws required. I only needed to remove one screw to take this drive out and put it into an SATA USB enclosure, and that was the screw on the drive bay lid.


Mounting the SATA drive on the circuit card for the external USB enclosure involves sliding the SATA edge connector into the circuit board connector and putting in a couple screws to hold it, if you're going to make the enclosure its permanent home. But don't make the mistake of thinking you're going to be able to boot your laptop from an external SATA hard drive, I haven't come across the laptop BIOS that can handle it yet. When the laptop BIOS gives you a "USB boot" option, it's the option to boot from a memory stick. Sabrent makes a SATA hard drive shell, in any case, if your laptop is a brick and you need to recover your data, pulling out the hard drive and putting it in an external USB case is usually the easiest approach, providing that the hard drive itself isn't fried.

{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}


“Access is Denied” error message
While accessing user files you can get “Access is Denied” error message. It happens because your user account on the broken laptop was password protected.
In order to get access to user files on the external hard drive you’ll have to take ownership over the user folder.
Here’s how you can take ownership over the Users folder (if you had Windows Vista or Windows 7 installed) or Documents and Settings folder (if you have Windows XP installed).

STEP 1.
1. Access files located on the external hard drive and
- Right click on Users folder (if you had Windows Vista or Windows 7 installed)
or
-Right click on Documents and Settings folder (if you had Windows XP installed)
and after that click on properties.
2. Click on Security tab in User Properties windows.
3. Click on Advanced button.

STEP 2.
1. Click on Owner tab in Advanced Security Settings for Users window.
2. Click on Edit button.

STEP 3.
1. Left click on Administrators group.
2. Check the Replace owner on subcontainers and objects box.
3. Click OK button.

STEP 4.
Click Yes in Windows Security windows.
Process of taking ownership might take a long time, it depends on how many files you have in Users or Documents and Settings folders.
After it’s done, you should be able to get access to your files.



If you liked this, please share and order for the complete eBook. Thanks!
For more laptop repair ebook, contact: internetinfowealthtech@gmail.com


This is an extract from the complete LAPTOP MOTHERBOARD FAULT FINDER eBook. The complete eBook provides a comprehensive overview of how to find and repair laptop common faults. This eBook in fully packed with over 125 full coloured pages with pictures for easy understanding to both the highly-tech and low-tech individuals. Great for beginners.

Below are some of the knowledge contained the eBook.
• Laptop Motherboard Component Overview
• Troubleshooting Laptop Motherboard Problems
• How to replace tiny sound ic chips in a Laptop motherboard
• Checking Voltage and Short Circuits with Multimeter
• Testing for Backlight or Inverter Failure
• Recovering Laptop Hard Drive Files With A USB Shell
• How To Fix Failed Nvidia Chip
• And Much More

[center]" Want To Learn PC And Laptop repair Now"
If You're Sick And Tired Of The Lockups, Bootup
Failures, Upgrade Problems, Those Slowdowns,
Drive Failures, Memory Low, Video Problems...?
Don't Put Up With Potential PC Failure When You
Can Start Viewing In-Depth, Step By Step, Detailed,
Powerful eBook That Teaches You PC Repair Starting... Right Now..!!![/center]

[center]Now Available For Sales[/center]
{sorry I couldn't attach images along with the post, please visit the link for full article: {[url]internetinfowealthtech..com[/url]}