HP G72 B27CL wont boot

[JeanPi]

Hey guys. My fiancée had a broken laptop laying around her house, which hadn't been used for about 2 years. I decided to fix the broken parts and got it to turn on for the first time in ages, but it booted with a black screen and only cpas locks and num loc blinking once every few seconds. I tried removing the ram, hard drive, battery and it still did the same thing, however, when i removed the cmos battery, the only things that blinked were wifi, power button and ethernet, and then it shuts itself down. After reconnecting the cmos battery, it still does the same thing, so i'm thinking the cmos battery is part of the problem. However, when it manages to actually make it past that, it then starts blinking on the caps lock and num lock buttons again with a black screen. Any suggestions?

 

[Laptop_Nerd]

Hi,

Please do try these troubleshooting steps that I suggested to others who had the same concern that may help.
- Start by doing a hard reboot, remove the battery and unplug the AC adapter then press and hold the power button for 20 seconds then try booting it up again.
- If this will not work, do test the AC adapter if it's working properly. Remove the battery and power the laptop with just the AC adapter connected and see if it will boot up or not. do also try a different AC adapter that has the same voltage and see if it will work or not.
- Proceed with reseating the RAM's if trying a different AC adapter will not work, remove them all for couple of seconds then put them back in making sure everything is seated properly.
- If it will still not work, connect an external monitor and see if you'll get any display from it. If there's a display on the external monitor that could mean that the problem is the built in display.
- But if there's still no display on the external monitor that means the problem lies in the motherboard.

 

[JeanPi]

Hi,

Please do try these troubleshooting steps that I suggested to others who had the same concern that may help.
- Start by doing a hard reboot, remove the battery and unplug the AC adapter then press and hold the power button for 20 seconds then try booting it up again.
- If this will not work, do test the AC adapter if it's working properly. Remove the battery and power the laptop with just the AC adapter connected and see if it will boot up or not. do also try a different AC adapter that has the same voltage and see if it will work or not.
- Proceed with reseating the RAM's if trying a different AC adapter will not work, remove them all for couple of seconds then put them back in making sure everything is seated properly.
- If it will still not work, connect an external monitor and see if you'll get any display from it. If there's a display on the external monitor that could mean that the problem is the built in display.
- But if there's still no display on the external monitor that means the problem lies in the motherboard.

already tried them all. Sadly, i do not have any other compatible ram sticks to test or another cmos battery. I'm willing to bet it's a fried motherboard, i just dont know how it happened.