Question Dell not powering up

Apr 5, 2020
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I am hoping that someone might help with a Dell laptop that is not powering up, I suspect the motherboard has gone but if someone could give me any further pointers I would really appreciate it. This laptop belongs to a cash strapped student, and I am trying to help him out. I have recovered some work files he was desperate for by connecting the HD to my desktop. The only peculiarity about this laptop is the keyboard has dual language on the keys, both- English alphabet and possibly Greek or Russian characters .
The laptop is made by Dell it has no stickers on the bottom except a service number, no OS sticker, no CPU stickers, so I can’t even give a model for it. It doesn’t power up and failed after a low battery shut down.
The symptoms are: press the power on button and the power Led lights for about 5 seconds then dies out, the fan isn’t turning nor does it even attempt to, no post (so no warning beeps), no splash screen, no perceptible backlight, no Leds except power( as mentioned above) and no drives winding up, in fact nothing.
I have individually unplugged and tried powering on each time after disconnecting the following : dvd/cd writer, hard drive (as said I have recovered some files for the owner he needed , on my desktop, so should rule that out), keyboard, memory (both sticks 1 at a time), wifi module, screen connector. I have tried various resets by removing power cord and battery as well as cmos battery. I have tested the power brick with voltage probes when disconnected ( not loaded though), but the Led remains lit when attempting a boot.

Regards Rob
 
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