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HP Recommended
HP ProBook 640 G4 Notebook PC
Microsoft Windows 10 (64-bit)

Can someone tell me why, when I turn on my laptop screen, nothing happens? The power button isn't working, and the lights on the keyboard aren't turning on either. Can someone explain what the issue might be?

1 ACCEPTED SOLUTION

Accepted Solutions
HP Recommended

If you have laptop repair experience it is possible to find a replacement motherboard and do a replacement for a fairly reasonable cost. If you have to buy the part PLUS pay a technician to do the repair it is likely to cost almost as much as a new laptop. So most people who experience a dead laptop motherboard buy a new laptop. The data on the hard drive is almost surely still intact and can be ported over to a new machine. 

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6 REPLIES 6
HP Recommended

It might be several things but the first suspect is a lack of power. If the AC adapter is no longer working and the battery is completely discharged there will be no response to the power button. Does a light come on next to the adapter socket when you plug in the adapter?

HP Recommended

Battery is completely ok power adaptor is also ok but the cooling fan still starts and off until the battery is finished. The power light on and off (color like mustard or yellow and white) after sometime the color is mustard or yellow constantly. Ssd and ram is also ok. I can't figure the problem. Plz help to find the problem

HP Recommended

That has all the symptoms of a dead motherboard.

HP Recommended

Then what should i do

HP Recommended

Then what should i do?

HP Recommended

If you have laptop repair experience it is possible to find a replacement motherboard and do a replacement for a fairly reasonable cost. If you have to buy the part PLUS pay a technician to do the repair it is likely to cost almost as much as a new laptop. So most people who experience a dead laptop motherboard buy a new laptop. The data on the hard drive is almost surely still intact and can be ported over to a new machine. 

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