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Hi,

The following problem has recently cropped up: when the computer has been switched on, the keyboard (optical ps/2) works as normally for a while, yet after about 5 minutes an inputting delay/lag starts to kick in, with letters coming up on the screen 5 seconds after i've typed them. The screen then suddenly blacks out, and the computer seems to go into some kind of standby mode, yet the fan starts making a very loud whirring sound. Once it goes into this mode the only way i can restart is to hold the power button. Could the keyboard be the cause of this, or could there be some underlying problem? Virus scan has come up with nothing. I would really appreciate some help.

Regards,

Stephen
 

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Hi Stephen, welcome to TSF

It could be related to overheating or a weak power supply unit.

Is it a desktop or laptop? If it's a desktop, remove the side panel from the case and blow out any dust with a can of compressed air, especially around the heatsink, fans, card slots and air filters. Make sure all fans are spinning and unobstructed by cables.

Please post your full system specs, including the details from the PSU label.

Make a note of the temperatures and voltages in BIOS, then start Windows and monitor the temps/volts with SpeedFan when the input starts to lag. Post back with both sets of readings.
 
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