Hmmm, I have seen a few people reporting this problem with this motherboard... seems to me that it might be a bug in the bios. Well, I had exactly the same problem. It did not even give a beep sound when the memory was completely removed. I was convinced that the motherboard was faulty. Then I thought of trying the following that helped:
On the board the JCMOS1 has 3 pins and pins 1 and 2 are closed in normal operation. Moving the jumper to pins 3 and 4 puts the motherboard in clear CMOS memory mode. So this is what I tried; I move the jumper to pins 3 and 4, pressed power a few times (although I don't think that is necessary), and after about 30 seconds I moved the jumper back to pins 1 and 2. Then when I pressed power the motherboard FINALLY emitted a beep and started up. On first start up I got a message, something to the effect of "CMOS checksum error", but I was then able to go into the bios reset defaults. I then saved and went out and my motherboard has been working fine since then. Hope this helps someone who has a similar issue.
Power on your PC without RAM. if it is giving beep sound then your motherboard is OK & RAM is faulty. so you can checked it by another RAM & SMPS one by one. if it is still not working with another RAM & SMPS then your motherboard is faulty. You can repaired it from service center.
SOURCE: monitor
Reset the Cmos battery,check the RAM,check the smps or check the motherboard ground, I think you problem will solve.
SOURCE: no beeps no bios display
There are several posiblities out of the the main problems are :
1) Faulty Power Supply. Your power supply may be not providing the proper amount of power.
2) You must be having the old version of bios which is having some problems in it. Update your motherboard bios (NOTE : Updating your bios may damage you motherboard if not done properly, do it own your risk, you may damage your board.)
Bios Updates can be found over here.
And the list updates included in the bios can be found over here.
Rajkumar
email: [email protected]
SOURCE: No Beep sound during startup. Motherboard or Processor ?
your on board atx smps connector is faulty, replace it..
SOURCE: Asrock P4i45gv motherboard problem
i am remove the motherboard & plaste the headsink inthe cpu cooling fan then start my computer cpu fan is running but no cpu heet no beep sound
SOURCE: My ECS P4M800-M7 Ver 3.1
It sounds like you are not getting the POWER OK signal on the motherboard (indicated by the lack of a greed POWER LED and no "beep") - either a connection is bad or the power supply itself is bad. If you have a meter, you can check that the power supply is outputting all the correct voltages. Using the black wire as ground/common, check the other wires coming from the power supply to a disk drive-leave them connected to the drive and probe into the back of the connector. The red should have +5V, the yellow should have +12V. You can do the same at the motherboard connector and you should be able to find a voltage at every non-black wire (the exact numbers escape me at the moment, but there should in addition to the above be a -5V and a -12V also).
Also, check to make sure nothing is plugged in backwards on your drives- commonly, you will lose POWER GOOD if a disk drive is plugged in wrong- on almost all non-SATA drives, the red wire on the power connector faces the pin 1 stripe on the IDE data cable.
If you do not have a meter or are not sure about what I said, try this:
Try powering up with all of your drives unplugged and see if you can get to the BIOS startup- if it still will not come up, disconnect every other thing plugged into your power supply EXCEPT the motherboard (CAUTION: If you unplug the CPU cooling fan, do not leave your PC on more than 30 seconds or so to avoid overheating the CPU!) - if you cannot at this point get your green POWER LED to light, either the power supply is bad (most likely) or the motherboard itself is bad.
Plug one drive in and listen to it when you power up... does it sound like it normally does when it is starting? In tech talk, it is called initialization and uncaging, and the sound is easily recognized if you have heard it once on a working PC. If the noises are not there, the problem is probably the power supply.
Good Luck!
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