Computer Booting Problem

[Memorti]

I am having a problem with my PC booting My computer wouldn't start, it doesn't even show the blue start up screen.

I walk into my room one day, the computer starts up with the strong fan sound, and all a sudden it sounded like its in a sleep mode or something, nothing I press on mouse and keyboard made it works. (the fan sound is usually strong up untill my window xp complete started) The monitor doesnt detect the computer any how, I don't think its the monitor connection problem because I turned on the speaker and wait and there were no window start up sound...

The only way I get it work is to unplug the power supply entirely untill the back LED is off, wait a while and plug it back and turn the pc on.... it takes multiple trials though...

Is it more like a software problem?My computer was bought few years ago - HP m7000 desktop

<<< System Summary >>>

> Mainboard : Asus LIMESTONE

> Chipset : Intel i945G/GZ

> Processor : Intel Pentium D 820 @ 2800 MHz

> Physical Memory : 5120 MB

> Video Card : NVIDIA GeForce 7300 GT

> Hard Disk : Maxtor (250 GB)

> Hard Disk : Generic (160 GB)

> DVD-Rom Drive : HL-DT-ST DVDRRW GWA-4166B

> DVD-Rom Drive : TSSTcorp DVD-ROM TS-H352C

> Monitor Type : Samsung SyncMaster - 22 inches

> Network Card : Intel Corporation 82801GB I/O Controller Hub LAN

> Operating System : Microsoft Windows XP Professional SP3

Thanks a lot for your help!!!

 

[04ihegba]

Sounds like an PSU earthing problem to me. Maybe the power isnt draining out of the system properly or something. When it does run, is it noticeably hotter than usual? If so, your power supply may be failing.

Also, does it run stable after you do get it to turn on?

 

[Memorti]

what is PSU earthing? I don't find it particularly hot after turned on. So far the system is fine after its turned on (it freezed once last week)

 

[04ihegba]

Basically, Laptops and other reasonably high powered portable battery devices aren't connected to an earth all the time, so they make and active earth inside the PSU. Basically, if you're having to remove the battery (thus effectively resetting this active earth, as it relies on the batteries flow of power) to get the box to turn on, than your active earth could be damaged. You would need to replace your PSU.


(For those interested in how this works:This would mean that when your laptop shuts down, the power drained out of it by the earth isnt completely dissipated and thus the power given back to your components when you switch back on is higher or lower than normal. The PSU earth self regulates so there isnt much other way to fix other than get a new PSU.)

 

[Memorti]

So i cant simply replace the power cord
Maybe I should never turn off the computer and let it run under stand by mode?

 

[04ihegba]

IDK, is your laptop able to run without the battery in it? If so, does it work? If it suffers from the same symptoms then no, PSU is your problem. If it doesn't run without the battery installed than replacing the power cord will do nothing.

 

[Memorti]

its a desktop will it be the same?

 

[04ihegba]

Err, your best bet would be to try a new power cord first haha.. I made the assumption you were talking about a laptop as laptop cables are quite expensive, and I would assume most would change the cable on a PC without asking us!