Cmos checksum invalid drivers#

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Cmos checksum invalid drivers#

Well I rebooted and then got nothing, tried this several times and still got nothing. Go to your drivers page and locate Bios update. I figured no biggie, that could make sense since I pulled the CMOS battery when used the heat gun on the GPU. I then let it cool put it back together gave it another try and ah ha I got an image on the screen, BUT it was an error message saying 'CMOS CHECKSUM INVALID, the defaults will be loaded, please restart the computer (CMOS RESET 502). So I watched some youtube videos and trying heating up the GPU with a heat gun. So I went to the web and quickly found that a 'black screen' issue on this model is very common, usually meaning the GPU needs to be reflowed. I first tried pulling all components, RAM, HARD DRIVE, WIFI card, DVD, Reseated the CPU, still nothing. Figured that would make sense since i couldn't get anything to display on the monitor after many attempts. I looked up the LED codes for this model and came to find that 4 lights meant a graphics problem. Well I hooked it up to an external monitor and nothing, nothing but a blinking CAP LOCKS light on the keyboard. I'm still running an 10 year laptop and I thought this would bea nice upgrade as it has an Intel i3 processor in it, and well I've installeed screens before, so I was excited to get my new laptop up and running. So I recently purchased a dv5 froma guy that supposedly just needed a new screen.