Hello,
I am new user now,but i saw some solutions that makes me believe and trust on you that i can get 100% satisfaction solution from u.
About my Home PC problem is:
By the past 4 days ,Our PC is not booting when i press the CPU button,no LED light in CPU button,no fan sound inside CPU,nothing else.
When i kept this machine like this after 2 or 3 hours, when i comeback and see, our Home PC is booting up automatically and opening OS smoothly, there's no inbetween error or anything else, just running smoothly.
But if we shut down and switch ON the CPU after 30 minutes or 1 hour, the above same problem exists as we press the CPU button,it doesn't powers ON...but if we see after 3 hours , our PC is booting up normally without any error screen messages and opening my OS Vista Ultimate and also XP [dual OS]

Even i tried without UPS,directly plugged into wall power socket to boot CPU,nothing happened.

what might be the problem happening like this always, any SMPS power problem or in motherboard or in memory RAM card, or in Backup UPS or ...what exactly the problem it is happening everytime for us.

Please HELP US that i mostly trust U

our Home PC configuration as below:
Intel MotherBoard DG35EC
Intel Core 2 QUAD Processor Q6600@2.40GHz
2GB RAM
OS - Vista Ultimate 32-bit operating system[service pack 1]-First option
- XP Professional Service Pack 3
Monitor- 19inch LCD Viewsonic VX1940W
DVD writer[internal-serial-ATA]- Samsung SH-S223F
Video and Sound- Inbuilt motherboad
SMPS - 350W
UPS -APC Back-UPS ES 500

Above PC system bought one year ago[december2008]

Hello arulprakash

Welcome to PC Help Forum

Please do not double post your issue as it leads to confusion.

Your problem with be dealt with shortly.

Thank you.

Welcome to the site.

The first thing we need to establish, as your PC is less than 12 months old, is warranty. Do you have one and if you do then you should be contacting the company that you bought the PC from. It is likely that your PSU has gone and that will cost you....not if you claim it under warranty however.

Thank u for ur reply
Sorry to quote about my wrong information about my power supply is 400W.
My PC is assembled with branded components with help of my known computer engineer friend[very distant friend].
Also i want to mention about my motherboard that i saw a green light still glows in my motherboard without this CPU doesn't boot, also even when in working condition, my PC time also going slowly within this 1 year to complete my 1 st New Home PC system anniversay. How is it possible that my PC time changed slowly, always keep on changing every time .
My Latest situation is from sunday onwards , my PC didn't boot at al even when i press the CPU power switch button in the morning,then no boot up..
By the previous day i switched the CPU power switch ON in the morning, then in the evening at 5:30 only, my PC booted up and worked normally till my night sleep before go to bed. Then on next day[sunday], i cleaned my PC to remove some dust with soft brush, not by disconnecting all the power supply,just removed all the connection by the back of the components like monitor wire,mouse,keyboard,ethernet,speaker wire,..and also remove[unplugged] my 2 GB RAM memory card and put it back into same slot, didn't do disconnected Hard disk cable,DVD drive cable, and rest of the wire was connected to motherboard i didn't touched it at all.
Then my PC didn't totally booted up till i waited for the evening and also by night time.
Till so far i didn't touched my CPU because of nervous and if i touch it didn't go wrong by major problem of afraid.
Tell me so far i told my PC condition now, what might be the problem exactly, then what i supposed to do now...

PLEASE HELP ME to know what happened to my Home PC

Hello arulprakash

The fact that the LED on the mainboard is on, indicates that the system gets power.
Now whether the power is enough, that is another matter..
The first thing that starts when you press the Power Button, is the Power Supply (PSU), which performs an internal self test, verifies it can provide the different Voltages the system requires, and then -AND ONLY THEN- initiates the boot sequence.


First: Power Supply is defective
Second: Did anyone removed the cables from the Power Button to the Motherboard? If they were re-connected incorrectly, then the system will not start.

Well I've got 3 possibles.
1. Faulty power switch. This is difficult to check as it is unlikely that you have a spare. Does the button 'feel' right when you press it. Do you hear/feel a click.
2. Faulty switch connection. Inside your case at the bottom right of your motherboard are a set of small connectors. Make sure they are seated securely.
http://www.build-your-own-computer.n...-wiring-01.jpg
3. Faulty power supply. Unfortunately with an intermittent problem this can only be diagnosed by replacing the power supply.

If you are using an online translator please try google translate as I find it more accurate.

Good luck