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Re: The PC I built won't turn on. The LED's work but...
Ya i think by all of that you hooked up, you need a great wattage PSU. Usually 512mb Graphic cards recommand on the specs for a 650+ wattage PSU. Try upgrading your PSU to 650+. Make sure there are no shorts.
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sounds like the CPU or ram are at fault. double check the fitting of each make sure the fitting of the heatsink hasn't damaged the chip. If using more than one Ram stick take one out and then swap them round. what did you do before to fix the problem? was it a short? check everything is as it should be. reset the bios using the jumper if there is one.
It seems like you have bad MOBO. I recently ordered all the stuff to build 2 new systems. Built the first one, no power, just like yours. Moved everything to the 2nd MOBO, everything worked. I did a RMA on the DOA MOBO. Got the new one and it fired right up. Sometimes you just get bad stuff.
your problem seams to be on the power line...take a good look and see if everything is connected to the supply ..and regarding the Ram problem ...if you recently upgraded..verify the speeds to be compatible and you also might try to choose from BIOS a +O,15 V ...also check ou if your Mobo supports different kinda DDR and DDR2 in the same time if this is the case...or if the module of RAM isn't too large for your model ..but in cases like this ...its ussualy the speed issue...ex..: ya have a DDR2 1G Ram on 800mhz and your pc supports speeds only to 667(666)mhz (check in bios) ..in this case it will run at half of the value... I hope this will help.....
Well depending on your bios version, it could be an array of things.
First try removing the video card and re-seating it.
Then re-seat the RAM.
If the problem persists re-seat the CPU.
Let us know the exact model of your motherboard so we can better troubleshoot your problem.
When you turn on your computer the system does a POST (Power On Self Test). If the POST sees an eror it will tell the BIOS (Basic Input Output System) and the BIOS will beep a code or display a code that indicated the problem.
Different motherboards contain different BIOS versions. BIOSes use different beep codes for problems depending on the manufacturer.
Hard disk LED pull-up (330 ohm) to +5 V
Front panel green LED
Hard disk active LED
Front panel yellow LED
Hope this helps, , if so please rate accordingly.
Well the say never answer a question with a question, so i will simply post 2 answers.
1. If you built the PC yourself, you may need to look at power requirements for this particular motherboard and perhaps transplant the board into a case with a larger power supply. (ie: 300, 350 watt power supply or better )
2. If this is an older PC and someone else built it for you, you may need to consider that power supply units do burn out in time and may need to be replaced.
The power LED simply means there is power coming to the light itself, but may not be enough to sustain an entire motherboard and components etc. This to me sounds very much like either the power supply is too small or burned out.