Black screen, but keyboard and fans work
My screen is black also HDMI output not working, i changed the BIOS battery to no avail.. keyboard lights up and fans work.
Hi @tor_w ,
Seems as though the laptop is not starting correctly and passing POST. Perhaps due to a corrupted BIOS.
Try a full power refresh and check if that resolves the problem. A power refresh restores the BIOS to its factory default condition. Any user defined BIOS settings that you have changed to suit your particular requirements will have to be made again
Turn off the laptop and disconnect the charger if connected.
Open the laptop and disconnect the main battery from the motherboard. You don’t have to remove it, just disconnect it.
Remove the RTC coin cell battery from the motherboard. Note the orientation of the battery before removal. Usually it is +ve on top, marked on the battery. Whilst the RTC battery is out, measure its voltage. If it is <2.5V DC replace it. The battery type is marked on the battery. (CR2032?)
Here’s a image from a teardown video that may help.
(click on image to enlarge)
Press and hold the laptop’s Power button for a full 30 seconds to drain any residual power left on the motherboard and then release it. This will restore the BIOS to default.
Correctly reinsert the RTC battery, reconnect the main battery, re assemble the laptop, connect the charger and try turning it on.
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