Symptoms:
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Since two weeks display used to suddenly disappear and then when it comes back the brightness used to be 100% scaled automatically.
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Now the computer is booting, the fan’s voice is there, Keyboards caps Lock is showing LED ON/OFF, but permanent blackout.
I took the machine to the local vendor he tried to troubleshoot the initially blamed the screen, but he tested with 5 screens none worked, which means the issue is somewhere from the motherboard.
Which steps should I take now? which hardware components should I suspect?