Ozilxavier:
Engineer Udem, please help me out here .My Acer travelmate won't turn on . I was gaming one evening like that and Nepa ceased power, but I continued. After some time the system froze, I waited for minutes so I had to force shut it by holding down the power button. It did shutdown, but the orange battery Indicator light kept blinking for days, till the battery drained out. Nepa finally restored power and it charged really fine, (battery Indicator working perfectly). However the mobo has refused to turn on since then. I noticed in the dark, whenever I open the lid or push the power button, the power and battery Indicators (orange and blue light) flashes in a millisecond and goes off, it's almost unnoticeable.
Also when I hold( ESC+Fn+POWER ) BIOS) the power Indicator(blue light) starts blinking every two seconds continuously. But it still doesn't turn on.
What marvels me, Is that the sleep charge USB port still functions flawlessly, it still charges my phone.It's a non removable battery, so I googled and I've done the pinhole battery reset and power button stuff to discharge static electricity but to no avail. I even had to find a way to detach the battery to power it on through the PSU. But the milliseconds stuff is all I get.

DBlackCeazer:
Well done, most of these repairs you've completed are by no means easy.

Toyyeebah:
@udemzyudex,
I have this Acer laptop that fell and screen got damaged, I left it at home for almost a year before getting the screen fixed but I forgot to remove the battery all those times it was not in use nor did I charge it. Now the system is not powering up and d eng said it's power IC is faulty. Please how can u help.

Samfilo31:
Can you replace vga

It displays divide into 6 but once motherboard heats up and you restart, mobo works fine

henrymorebaba:
@udemzyudex. Please my laptop is not coming up at all, even with battery or without battery. Someone said it might be the power ic and that is not good to replace it because it might have the same issue again after 5 months that is better I get a new laptop. please enlighten me.

udemzyudex:


Funny, even if you get a new laptop today, it won't stop it from developing fault that's why new device comes with warranty.

If we decide to go by that analogy then there won't be any need of repairing any device or anything repairable at all.

Base on your case, if it happens that it can't be fix you can easily get another motherboard instead of just buying a new laptop unless you really want to get a new one.

udemzyudex:
Part number : LA-G07EP

Fault : Dead
This mobo uses the ACDRV concept, the charging ic will release ACDRV volt to the gate of the ACfet before voltage can flow into the board, however the gate volt was fluctuating from 16v,18v,25v etc.
I remove and replace the mosfet and mobo works fine

SPLENDID25:
my Dell latitude e6230 has refused to come on( it doesn't blink the cylindrical light Dell blinks, which indicates it's reading or writing data). It only shows power button light, capslock light blinks thrice and speaker makes crackling sound(it doesn't beep), and the issue is not the HDD, because I have changed it, and cleaned the RAM terminals too but it still didn't come on. Please help, with possible reasons as to why this is happening.
I am scared because my exams is fast approaching and the repairman I took it to yesterday hasn't called back.It started behaving this way some weeks ago.But if I remove the battery, press the power button for maybe 20seconds and replug charger, it'll come on.But yesterday, it just refused...And I don't reside in Lagos.

udemzyudex:


I really can't say exactly what's wrong with it unless handle it but I'll suggest you call the repair man and confirm the progress of repair.

When it comes to motherboard issue same fault does not necessarily mean same solution, it might be a corrupt bios issue, processor not processing, RAM not reading or probably S4/S3 state not running.

Fault can come from any where in this kind of situation.

uzoexcel:
What is your charge like sir?

uzoexcel:
What is your charge like sir?

uzoexcel:

@udeme.
Good work on my laptop. Thanks very much.

udemzyudex:
Part number :LA-C701P
Fault : Dead

If you check from the beginning of this thread, I wrote about the chips and components that allows the laptop motherboard to turn on.

This is another example of a dead case caused by a faulty PCH, in this case the CPU and PCH are on on chip called the Soc (system on chip)

19v line was fine, I checked the 3.3v/5v coil and noticed the 3.3v coil was short to ground, I decide to check which part the short was coming from, either from the imput or output side by lifting one pin of the 3.3v coil.
I noticed the output side was short to ground, that means the sections 3.3v was going to was short, 3.3v goes PCH, Lid_sw, rtc, bios pin 8,pwr button, dc/dc section to mention a few, to narrow it down, I decide to use the injection method.
I inject volt into the output side of the coil and found out that the PCH was heating up ( circled part on the Soc)

That's it, the board is gone and need replacement, replacing the Soc can be difficult unless you have a BGA machine.