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Solve : What makes PC shut off???????????

Answer»

I have the PC shut down problem while Switch Off the Fan.

When PC is ON at that TIME if I switch FAN off, the Fan Switch make sound like Sparkling Inside the box, but when PC is Off but FAN is on and while Switching the fan off I didn't hear any Sparking Sound inside the Box.

All wiring/switch are just 1 year old (I use Anchor Fireproof wires and Fan Regulator. Just today I change all Switches in Board  and the New one is from Anchor - Anchor is good reputed electric accessories brand in India)

Is PSU going to Kaput and Signaling me to get replaced it?

My System is:

P IV, 2.4 processor Pentium,
Sony DVD RW DRU 800, Floppy Drive, 80 GB Samsung HDD, 512+128 mb RAM.
Samsung 793s monitor, Logitech Keyboard, MS Basic Optical Mouse.

If PSU is problem which one will you suggest, I use my PC for Office work, average 12-15 hrs a day.

Any other suggestion for solution or I need to replace PSU?

ThanksIt sounds like a power supply issue and you told us nothing about that. What is the make and wattage?

For a replacement I would suggest Antec at www.newegg.com Those "el cheapo" power supplies are unreliable and can DAMAGE other components. If the PSU doesn't sell for at least $50 you can rest assured it's junk from China. What is the computer make/model? Sometimes this is relevant. Quote

It sounds like a power supply issue and you told us nothing about that. What is the make and wattage?

For a replacement I would suggest Antec at www.newegg.com Those "el cheapo" power supplies are unreliable and can damage other components. If the PSU doesn't sell for at least $50 you can rest assured it's junk from China. What is the computer make/model? Sometimes this is relevant.

PC: Pentium D845GBV MOBO, 2.4 Mhz procy Socket 478 mPGA.
Sony DVD RW -DRU 800, 512+128 DDR 400 RAM, HP Printer, Samsung 793s monitior, 80GB Samsung HDD, Floppy drive.

PSU is Xtech, Model - LWT 2505 - 350W - A2.03 and yes it is China Make.

Prior to this I have same problem with my OLD system I change the system and electric fitting too and since no problem in last 1 year but just yesterday I face the problem once only and than I didn't get same problem again.

I open the PSU and blow away all Dust, do same thing with Processor by removing dust from Processor fan and heat sink.

Amazing, what makes PC to prevent shutoff NOW???

Thanks for reply.Yep it certainly sounds like a power supply issue. How long have you had the power supply?

And a little somthing to keep in mind, be carefull when opening up a power supply, the capacitators inside harbor a nasty shock if you happen to nudge one a little too hard.

I'd get a new power supply, Antec, Hiper, Collermaster are all decent manufactures, get somthing with at least 430W, although it's more than enough, power supplys wattage drops over time due to wear and tear, so somthing inbetween 430-550W will be fine.I'll mention another brand:  FSP Group (Fortron Source).  I have this one:  FSP Group (Fortron Source) AX400-PN, RoHS, 12cm FAN, version 2.2, 2 SATA, 20+ 4 pin, PCI Express, 400W Power Supply - Retail

400W should be plenty.  I see nothing about the hardware components you listed that indicates a need for even 400W, so 400W is probably more than adequate.I only mentioned a more than adequate wattage just to save the need to replace the PSU over a time. Anything under 400W and your cutting it a little close to the line, and will probally end up replacing the unit in a year or so, your call. Quote
I have the PC shut down problem while Switch Off the Fan.
 
When PC is ON at that time if I switch FAN off, the Fan Switch make sound like Sparkling Inside the box, but when PC is Off but FAN is on and while Switching the fan off I didn't hear any Sparking Sound inside the Box.
 
All wiring/switch are just 1 year old (I use Anchor Fireproof wires and Fan Regulator. Just today I change all Switches in Board  and the New one is from Anchor - Anchor is good reputed electric accessories brand in India)
 
Is PSU going to Kaput and Signaling me to get replaced it?
Aside from drifting off into PSU discussions I just don't quite 'get this'. :-?Turn on the wangming filter. It will all become clear. Quote
Quote
I have the PC shut down problem while Switch Off the Fan.
 
When PC is ON at that time if I switch FAN off, the Fan Switch make sound like Sparkling Inside the box, but when PC is Off but FAN is on and while Switching the fan off I didn't hear any Sparking Sound inside the Box.
 
All wiring/switch are just 1 year old (I use Anchor Fireproof wires and Fan Regulator. Just today I change all Switches in Board  and the New one is from Anchor - Anchor is good reputed electric accessories brand in India)
 
Is PSU going to Kaput and Signaling me to get replaced it?
Aside from drifting off into PSU discussions I just don't quite 'get this'. :-?


Let me try again:

You need electricty Switch Board to Plug Monitor Power Cable, CPU Power Cabel. On Electircty Board I have 4 Switch, 3 Socekts and Fan Regulator.

I need to ON all Switches while I work with PC 3 swithces used for montor power, CPU power and modem respectively, remaining one I use to ON fan.

Meanwhil if I didn't required FAN (cold season here now) and if I Switch OFF the FAN at that time I CLEARLY hear Sparking Sound from FAN SWITCH. (Out of 4 one switch DEDICATED for FAN on/off prpose)

Now if I didn't use PC and need only FAN, at that time all 3 Switches are off except the FAN Switch (FAN is ON) and now if I OFF the FAN at that time I didn't hear any Sparking Sound from the Switch.
Quote
Turn on the wangming filter. It will all become clear.


Sory Mod,

But I didn't get you, can you please explain in detail and if possible please show picture (url/example etc)
Quote
Sparking Sound inside the Box.
Quote
Sparking Sound from the Switch.
Are you sure where the noise is coming from?
All switches will spark when turning off.
Try unplugging your speakers and see if it disappears. Quote
Quote
Sparking Sound inside the Box.
Quote
Sparking Sound from the Switch.
Are you sure where the noise is coming from?
All switches will spark when turning off.
Try unplugging your speakers and see if it disappears.

Sorry for Poor English.

Sparking Sound from All 4 Switch.
I didn't use Speakers.

Yesterday I noticed same and change all 4 Switches with A Grade Quality Switches but they too make Sparkling Noise.

All other Electrical Fittings are A Grade Quality  and from Branded Company.

Thanks for quick replies
Quote
All switches will spark when turning off.
I don't believe you have a problem. Quote
Quote
All switches will spark when turning off.
I don't believe you have a problem.

All Switches Makes Sparking Sound with Spark - Just SEEN spark with sound while Swithcing ON - this is current situation 10 minutes before this post.


I was out for 3 hrs so meanwhil PC is shutdown. I return to home and as soon as I start it and just after 30 seconds I Turn FAN On , I hear and see spakle with sound in FAN Switch and PC get Restarted Automatically and  give me following Message/Warning.

"The CPU was previously shutdown due to thermal event (overheating). Service the unit right now to resolve this"

But as I said ealier PC was Shutdown for 3 hours than how as soon as I start it and CPU get so much heat that it restart the PC?

I have same issue with OLD PC with same configuration (just mother board was changed- previously I had D845GBVSR - it's capacitors get Leaked - as this make of MOBO was porn to such problem as per Intel Website)

Please help me.So much time pass out bit No replies? What happend to all Techi here?


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