pc is on but there is no display , mouse or keyboard lights are not on?

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khuzaimaaftab

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Aug 10, 2014
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Hello Everyone :) I built my first PC a couple of months ago. It has been working fine until now. It will not show anything on the monitor and their is also no lights on the keyboard and mouse. However, the fans and LEDs are all working fine.i dont know much about pc wiring but i reconnected the wire connecting power supply to motherboard. this solved my problem but once i sut it down for 5 hours i again give the same problem. the time of is not changed and it shows the time when i turned it off last time. my specs are:
1 500 w seasonic 80 + psu
2 2600 i7
3 250 gb hdd
4 8 gb ram 1 stick
5 intel mother board
plz answer quick , and thanks!
 
Solution
BadActor
After you replace the battery, you need to go into the Bios and reset the date and time and any other settings you had previously that weren't default.
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khuzaimaaftab

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Aug 10, 2014
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can cmos battery case booting problem?
and how do i check them?
i think psu and mobo are fine as the pc boots when i remove and replug the connector.
 
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khuzaimaaftab

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thanks bro i will replace it tommorow and if it works then ill pick your answer as solution.
 
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Karadjgne

Karadjgne

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Bad ram can also cause this, as can a short in the keyboard or other usb device. USB devices themselves can be culprits as the pc is trying to use them as a storage device but the device itself doesn't register as such so throwing bios into a loop that doesn't move. It can depend entirely on bios settings. Dead or failing battery is usually detectable when the actual time is wrong, system time is maintained by the cmos battery as will be evident of the battery is removed and the mobo power is discharged. Unplug the pc, remove the battery, hold down power button and count to 10.

Is anything at all showing up on the monitor? Like a bios post before going to black screen?
 
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khuzaimaaftab

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Aug 10, 2014
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i replaced cmos battery my self the pc started fine , but as i switched pc off 2 hours and then powered it on so it had same problem but then i repluged mobo plug and power pc so on screen there was written some date and time problem and cmos cheacksum failure plz help me with this . the date of pc was same as when i powerded it off
 
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khuzaimaaftab

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Aug 10, 2014
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i replaced cmos battery my self the pc started fine , but as i switched pc off 2 hours and then powered it on so it had same problem but then i repluged mobo plug and power pc so on screen there was written some date and time problem and cmos cheacksum failure plz help me with this . the date of pc was same as when i powerded it off
 
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K

khuzaimaaftab

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Aug 10, 2014
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4,540
i replaced cmos battery my self the pc started fine , but as i switched pc off 2 hours and then powered it on so it had same problem but then i repluged mobo plug and power pc so on screen there was written some date and time problem and cmos cheacksum failure plz help me with this . the date of pc was same as when i powerded it off
 
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Karadjgne

Karadjgne

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For now, I'd use factory default values, reset the time/date. If they are wrong, which they will be, there will be errors as drivers and files get funky when loaded as they require verification. A checsum error occurs when there is a non user change to cmos. This confuses the bios. Most usually the fix is just reset the cmos by unplugging the pc, moving the cmos jumper to the other set of pins for 2 seconds, return jumper to original pins, plug pc in and reboot. The only change I'dake is in the video settings and changing primary display from igpu to peg. This sets the video to come from the pcie graphics, not the on board graphics processor.
 
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khuzaimaaftab

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Aug 10, 2014
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I replaced cmos even then the time is not changing and after a power off for 8 hours the pc didnt start normally, i had to unplug and replug it to start plz help, i didnt do any changes except date
 
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khuzaimaaftab

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Aug 10, 2014
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I replaced cmos even then the time is not changing and after a power off for 8 hours the pc didnt start normally, i had to unplug and replug it to start plz help, i didnt do any changes except date
 
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khuzaimaaftab

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Aug 10, 2014
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guys i reset the date and time and then restarted the pc this solved the problem. when i replaced the battery for the first time there was some sort of loosing so that gave me the same problem when i tried to boot my pc. thanks every one for your help!
 
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