My PC can't turn on. I tried to change chargers but still more
I tried to change different chargers but still more it's not picking, and no light is shown.😒
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Check if the laptop's DC-In jack is OK, (supplier example only to show the part).
Sometimes the centre pin of the jack breaks internally (where you can't see it) and this prevents the power from the charger either charging the battery or running the laptop. So it may be that the battery has gone flat because it couldn't be charged and the laptop can't start because there was no power available from the battery or the charger.
Here's a video that shows how to dis-assemble the laptop, that may help. I realize that it is not for a DC-In jack replacement but it is still useful as it shows how to open the laptop to gain access to it, so that the DC-In jack can be tested to see if it is OK.
If the jack is faulty, there are other suppliers online for the DC-In jack that may suit you better. Just search for Acer TravelMate P255-MG DC-In jack to get results
If it is OK then you would need to do further testing as to why the motherboard isn't indicating that it is getting any power. You would need the motherboard schematics to do this.
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