I have three years old HP Laptop (HP CQ42). It was working just fine till yesterday. Yesterday, I left my laptop turned on for about half an hour. When I came back, there was no display. Only "Caps Lock LED" was blinking and "WI-FI LED" was red. Now, when I try to turn it on, I can hear the fan/HDD spinning but there is no display (only blinking Caps Lock LED and red WI-FI LED). I tried to turn on my laptop with battery and without battery (on ac main) but no luck. I also, tried to reset BIOS by taking the battery out and pressing power button for 30 seconds. Still my laptop is not working. Is my motherboard dead? Please help.
closed as too broad by Máté Juhász, DavidPostill♦, fixer1234, Run5k, music2myear Mar 7 '17 at 17:46
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Try following options to get rid of problem:
- Remove the battery and plug the charger then switch on laptop. If it successfully on then shut down laptop from start option and remove charger plug, insert battery and you are done. If it wont works dont worry you have other option too.
- Take a screw driver from your junk collection and remove and insert the hard disk. This one is just like refresh your memory.
So dont blame me if it doesn't work in your case. But 99% of the time I am sure this will works.
i have noticed that the problem is caused by a corrupted bios bin file and you need to desolder your bios and reprogram it or completely replace it with a new one. 2: the problem could also be a faulty display chip and in this case you have to reflow the chip or completely remove it and put a new one though this option requires expertise and specilised equipment like bga machine to do the job