The 1 Month Problem!

More likely something got disconnected, or the hard drive is corrupt...
Can you see the BIOS post onscreen? Are there any beeps while booting?

Check the monitor cable, make sure there aren't any bent pins.
Test the monitor on a different computer.
Test a different monitor on the troubled computer.
Did you remove the heatsink from the CPU while cleaning? If you did, then did you re-apply thermal grease properly?
Make sure the memory is seated properly.
Make sure all cables from the power supply are seated properly.
Make sure the hard drive cables are seated properly and in the correct orientation (not connected backward)
Try unplugging the CD and DVD drives in case it is a power issue.

Cleaning out the PC with a vacuum is a good idea, better than using canned air which just blows the dust around and under the motherboard, into empty slots and into the power supply.

Good luck. 8)

Cleaning out a computer with a vacuum is a vary bad idea DO NOT DO THAT! The electrostatic that will discharge in your computer will most likely fry things. Canned air is hte best way to clean it out. Take out everything in the computer and clean it piece by piece. Also anti static wipes is a easy way to clean alot of things in a computer.

I realized that after I was done cleaning it.

If one has a good building ground, and one's wall plate is connected properly and the power supply is performing as it should (and turned off but still plugged in) then vacuuming is no worse (or better) than canned air. If any of the above conditions are less than optimal, then either method is bad. Esd is more about moving the dust than about how one does it. And an antistatic mat that is not properly grounded will not help either... Nor will a wrist strap that's not properly grounded...

http://multimedia.mmm.com/mws/medi [...] 8rCOrrrrQ-

One of many links on 3m's website relating to esd... There are other sites, 3m's is just handy.

Basically, get properly grounded or your stuff's dead. cmos is so sensitive that the rf from your mobile will fry it. From two meters....

might just be me but i dont think they ever made a 1200+ CPU

i see three possible reasons:

-your mobo is dead (bios)
-your psu is dead
-you made a stupid mistake with cabling and stuff

*hoping
it's the third....*

Sounds more like a 1200ghz cpu not a 1200+ would be clocked more like 1050ghz i cannot find refference to a 1200+ anywhere on the net. That said its a thunderbird cpu they tend to get vary hot whats your cooling like? do you know if the cooling has been compramised? That sort of problem normaly isnt caused by a memory stick being bad or loose it would post and beep in that case. Have you tried taring it apart and putting it together on a wooden surface to see if it posts out of the case? I would have to agree with exarrkun either that or its grounded somehow.

Also, I just took out the memory stick and started up the computer, there was no beeps either, so that confirms the MoBo is dead.

ESD Fundamentals

Thats not a good sign...

Also, I can't test the CPU, and I know the graphics card is working.

I would like one of those

No problem

one long three short beeps normaly indicates memory

Ok lets say the monitor works, and you connected everything right. Video card works cause you switched it out you said.

THE ONLY reason it wouldnt post is
1. Motherboard is fryed (thats what i think)
2. Power supply is not giving enough voltage to post but is providing voltage for the fans. (i think this is unlikely though)

My advice is try the following:

Unplug all devices, ram, video and any PCI cards, disk drive cables. If you connect an IDE cable the worng way your machine will not boot!!!

Boot system, make sure speaker wire is connected!!!!!

If you get no system beeps at all then your mobo is most likely dead. That's not so bas as ebay is a good source of older mobo's and you'll only need to get same chipset in order to avoid XP reinstall.

If you get system beeps then mobo should be OK. Insert RAM and reboot. If you get beeps then insert VGA and reboot. If you get beeps now then most likely RAM or VGA is dead. THe beeps are different for VGA and RAM problems, I cant remember for sure but believe that long beeps indicate a RAM problem.

If machine now boots then most likely cause was a drive cable round wrong way, remember red stripe on cable indicates pin 1.

You can now insert cables for disk drives (one at a time, forget floppy!).

Baiscally you have to narrow down the problem by adding one device at a time.

Hope that helps, hope you get it working.

If all else fails then contact a small local PC repair company and tell them that you are a poor 14 year old and wondered if they had any old systems going spare, dont forget to mention your PC is broke, you never know they might be the charitable type

As you are trying "long shot" cures for this PC, I recommend pulling the power cable from the wall, then popping the BIOS backup battery from the motherboard for a few minutes. Even though it's doubtful to be a bios issue I have seen a dead machine come back to life this way.

I also recommend trying to boot the machine with all the drives disconnected, and just power to the motherboard. If it's a faulty hard drive ( and yes I have seen a faulty HD stop a machine booting ) or CD of floppy then this gives you every chance of getting a bios screen to come up.

Like many people on this board I've spent many an hour trying to rectify issues that have arisen once I decided to open the case for a little cleaning or tidying. Sometimes it pays to leave alone if the thing appears to be working okay.

I agree with the people who said earlier that vacuuming the PC was one of the worst things you could do. It really is an easy way to create electrostic charge that is in the thousands of volts. Even though it has a tiny current a discharge of ectrostatic energy can blow holes inside delicate electronics. A really good technician uses an insulating mat and wrist strap for that kind of work.

I hope you have a luck with the computer.

When you do and if they say its the motherboard ask if they have a epromm tester if its simple as the bios google bios replacment chips and get a new one youll be set. If not depends on what is said :-/

Thnking about this from a logical point of view.... don't spend any more time on the PC.

Just go and offer to wash people's cars for $10 and save up the cash for a new PC. As the guy earlier said... you can always try to sell the good parts on Ebay. I once bought a box of computer parts at a yard sale for $22 and sold them for $400.

I agree with Enforcer22 about the power supply, I work at a computer repair shop and we see dead power supplies all the time... and some only fail partially. Sometimes you lose the 5v feed but the 12v still works, this can make things difficult to diagnose which is why we have a psu tester for them. Often a flaky machine, with intermittent issues can be made stable again by a new power supply.

But then we are back to how much time and money to throw at a 1200mhz machine. I don't think you should be spending more than $10 on fixing this.

thanks for the info
didn't knew that

lol
thank you o mighty google user

u can't mean that!!! 8O 8O 8O
are you from mars???

webcrawler...
believe it or not but i never heard of that one before

(omg we are spamming this forum )

yeah is kinda cool
finds other things than google
now i can even become smarter