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Hi, I'm Sudipto. Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP
Do you hear any beep sound, when you power on the PC ?
Do you have any display on the screen ?
Thanks, ***** ***** update, I tried to research on the problem, you are facing and find out that the two blinking lights on the keyboard indicates problem with the motherboard , to be specific the graphics controller on the motherboard is defective and unfortunately the only solution for this problem is replacing the motherboard and I think your doubt is correct that the shop or repair center did not replace the motherboard.
I can explain, what was done. When any circuit board gets defective, we first try to blow hot air on the board and in most of the cases the problem gets solve because it softens the solders on the board and in your case, they have done the same thing. That is why the problem reappeared after one year. Can you tell me, if the same thing was happening before replacing the CPU ?
What was happening before you installed the motherboard ?
Did you buy a new or used motherboard ?
Check the invoice, because as the problem is with the board, you may get a replacement from them.
Please let me know, if you need any further information, otherwise please remember to give a positive rating, as that is the only way I am compensated for my time and effort.
Hi there new expert here.
Either the new board you got is not functioning, or something is not connected correctly. It sounds like you have eliminated all other possibilities. Honestly at this point if you cannot get a replacement board for free I would suggest buying a new laptop. I think it would save you time and money in the long run. You could pull the hard drive out of this one and transfer your data over.
As a professional tech I do not even work on laptops anymore for hardware issues unless it is something simple like a ram upgrade or new hard drive. The reason is because it takes too much time and I would have to charge the customer almost the same amount as it would cost to get a new one. I know you are doing the work yourself but your time is valuable to you I am sure as your money. So as I said, if you can get a replacement board free give it another try, if not I would suggest getting a new laptop.
At this time click the stars above to finish for now, 5 stars is very appreciated.