The patient is a Packard Bell LJ61-RD-206fr KBYF0
The problem is "Black Screen and no OS booting"
Upon powering on, the fan runs briefly (it stops after 5 seconds), the processor heats up a bit and the fan doesn't restart.
We tested changing the RAM sticks around or using one at a time, but it still doesn't work.
Checked the hard drive (without much hope initially), nothing to report, well connected and secured for grounding.
Checked the Wi-Fi card, nothing to report after disassembly and reassembly.
The device is free of dust.
The screen does not turn on; after trying keys F2, F3, F4... nothing happens.
The touch buttons (volume and touchpad lock/unlock) light up when pressed.
The blue power light is on. We tried with and without the battery, with and without the charger, but the same issue persists. The battery status light also illuminates.
No smell, no visible burns.
No sound.
That's everything I believe I've covered regarding my problem.
If someone has a usable idea....
If you think it's a hardware failure, please let me know how to test this possibility.
Thanks in advance to those who will try to help me.