Chosen Solution
When I press the power button, the keyboard lights will enter some kind of loop, where they turn on and off repeatedly, but nothing else happens, no image on screen, no boot messages or image, nothing. I tried replacing the battery with a new one, and tried using a different charger, and still have the same issue.
Update (11/14/2021) A late update: ~1 month after resolving the issue, the laptop started having similar problems again. To solve them, i just removed 1 of the RAM modules. Haven’t had any more issues, apart from a defective battery. So it seems the problem was the RAM.
Hi, Try a full power refresh and check if that resolves the problem. Here’s the procedure: Disconnect the charger from the laptop. Remove the main battery from the laptop. Disconnect the RTC coin cell battery from the motherboard. Here’s the maintenance and service guide for the laptop. Go to p.29 & p.37 to view the necessary pre-requisite steps and then the procedure to remove the main battery and the RTC battery, respectively. Press and hold the laptop’s Power On button for a full 30 seconds and then release it. Reconnect the RTC coin cell battery, re-assemble the laptop, re-insert the main battery, connect the charger to the laptop and try to start it. If it starts, there may be a message about the date and time being incorrect. This is normal as the above procedure has reset the BIOS back to its factory defaults. Once the date and time have been adjusted, the message won’t appear the next time the laptop is started. Any user defined BIOS settings that have been altered by you to suit your particular requirements will need to be changed back also.
This is how I ended up solving the issue:I changed the order of the 2x8 ram modules after following the steps @jayeff mentioned, then it booted up normally. Also, after resetting the RTC battery, i waited for a while (~10-15 min) before doing the ram change.
