Hello folks pls i need ur view & surgestion on this issue i m about to unveil...

I happen to be an engineer, i also have one dude that he is also an engineer too.. This guy mainly work on laptop board but for me i m system software engineer. I could record 3 occassion that i ve took board to this fellow to repair without no solution... But this last one happen on thursday morning.

I took a laptop to him to buy screen from his hand, after testing like two working screen with the system we discover that the system is selecting screen. For him to make his own money he said is going to work some things on the board and the system wil be working with any screen, which he did and it work.

He collected money for his work instantly and i took the laptop to my office to install on it i notice that the system was generating too much HEAT.
I off the system and close for the day.

The second day i try to put on the sytem and it was not coming up.
My client came for the system and i told him that his system power button is bad because i could ON the laptop direct from the Mother Board..
I have to call this same dude for the power button and he said is going to cost 1500 to replace or fix it.... Cos i dont ve system with that same power button.

I took the system their and he was trouble-shooting the power button with his own charger. Suddenly i just hear PRA.. Spark from charger to the board.

Before i knew it the system board has BURN beyound repair...

Pls who is going to bear the Damage/responsible for the changing of the Laptop Mother Board?

This same guy was telling me to lie to my client that his system Board is bad and he should replace it.... Telling me that the board is weak already and it need to be replace....

Pls should i fight this guy to change the board or i should lie to my client?....

Meanwhile he has given me money to change the screen which was the initial problem?