Hello everyone, the client said the laptop was performing updates and after, that happened. The laptop behavior is as follows:

1. When the laptop is powered on or auto powered from a power reset, the dell logo shows for a second and the screen goes blank but the backlight stays on. This happens whether memory is installed or removed. It stays like this for a considerable time and then it repeats.

2. All the voltages rise, and fans spin for that one second that the logo comes on and goes off and then all voltages drop, with the exception of 3V/5V ALW and PCH voltages 1.05v, 1.8v, and 3.3v, and heat from the PCH is considerably low.

3.There is oscillation on the 24Khz for the PCH but not on the 24Mhz. There is also oscillation on the EC controller EC5107 crystal.

4. The battery charges and current draw from charger when laptop is powered without battery installed is hovering between 512mA an 517mA.

5. ME Analyzer showed errors in the bios backup, and I repaired and reflashed and also tried different files online but still no change in behavior.

I'm at a loss now as to whether it has developed a hardware fault or it's still a firmware issue. Any help in the right direction will be appreciated.