well the screen is dead and the emachine splash is dead
so screen triple dead if BIOS is dead, so we fix that first.
here are the tests in order correct.
and quadro dead, fans dead.
All uSB devices unplugged. DVD tray EMPTY for sure does button eject work if not power is failing. to DVD drive.
1: remove the huge battery first they short
and overload the PSU power rails and VRM inside the PC , just remove it.(easy no?)_
2; then use only the AC to DC power pack for power, even for ever.
let me be clear run on AC power only.
3: screen wake up yet? a goal best BIOS screens up.
4: the flashlight test
is next to any black screen , pc seems on.
I can hear HDD spin ear to casing of hdd, hummmm
5: still dead screen? out the hdd, remove it and DVD drive both
as those to can short, in fact up to 20 things in a PC can FAIL.
6: the coin cell above 2.9vdc and never below, 3.3vdc new.
7: strip the PC down more, in you mind focus on modules and device that can short, even to to 1 stick of DDR memory, AC power cord pull do not remove things inside any PC with AC power to wall jack, ever, and big battery is already gone until PC runs right again,.
2009 MADE NEW. CCFL INSIDE !!!!!!!!!!
emachines eMachines W4620 (M622-UK8X)