Presario SR 1055CL will not turn on I believe its the on off switch
If the computer started giving you trouble turning on before it failed, it is probably the power supply and not the switch itself. To check, you will need to take the computer case off. There are usually 2 power switches on a pc. The first one disconnects the incoming line voltage completely. Make sure this switch is on before you try the other power switch. The second power switch actually starts the computer. The power disconnect switch is a toggle (or latch), that is, it retains its position. The switch that actually starts your pc is a momentary contact switch.
To test the momentary start switch, you will need to take the cover off. Be careful not to damage anything and watch out for exposed voltages. If you pay attention, it is not dangerous. All you need to do is short the 2 wires that go to the case switch momentarily. Once shorted, the motherboard latches on until a power failure or shutdown. Note that you do not want to keep the 2 switch wires shorted, since this will prevent the pc from booting. Just short them for about as long as you normally push the power button in.
If the switch is bad, they are not usually difficult to replace. You should be able to find a part number on the switch, as well as manufacturer. While it seems like all the case switches are custom per model, they are not. The actual switch itself is actuated by a plastic button on the case.
Nov 20, 2012 |