I just fixed this problem on my 5750, one of the connections to the DC jack had snapped off so was only making intermittent contact. No new parts required but I did have to strip it down to get at the problem and solder the connection back on. The laptop switching itself off when you apply too much pressure to the dc connection is a separate issue you can deal with at the same time - the DC jack is stuck down with glue, which doesn't do the job so if you angle the power cable wrong it will move up enough to hit the power button from below. Sloppy design from Acer, but you just need to re-secure the jack so it can't move.
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I just fixed this problem on my 5750, one of the connections to the DC jack had snapped off so was only making intermittent contact. No new parts required but I did have to strip it down to get at the problem and solder the connection back on.
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The laptop switching itself off when you apply too much pressure to the dc connection is a separate issue you can deal with at the same time - the DC jack is stuck down with glue, which doesn't do the job so if you angle the power cable wrong it will move up enough to hit the power button from below. Sloppy design from Acer, but you just need to re-secure the jack so it can't move.
I just fixed this problem on my 5750, one of the connections to the DC jack had snapped off so was only making intermittent contact. No new parts required but I did have to strip it down to get at the problem and solder the connection back on. The laptop switching itself off when you apply too much pressure to the dc connection is a separate issue you can deal with at the same time - the DC jack is stuck down with glue, which doesn't do the job so if you angle the power cable wrong it will move up enough to hit the power button from below. Sloppy design from Acer, but you just need to re-secure the jack so it can't move.