When I start the PC, CPU fan start running, HD spin up but nothing on the screen. I have of course tried to swap memory on all banks, tried new Graficcard, replaced the power supply, reset C-mos so now I'm running out of ideas.
There are no sound like beeps.
As I see it the problem are somehow related to the output for the monitor, therefore I also tried to mount a PCI graficcard, still nothing.
The HD used have Windows XP installed from an other PC.
I'm not sure whether the RAM used are correct, it's PC2700 - is that correct? Neither whether all Banks should be filled or is it enough with one or two banks.
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ok well make sure you have the right ram look in the manual and see if it needs to be non error correcting or error correcting (non ecc or ecc) and if it needs to be registerd or unregisterd ram (AKA: bufferd and unbufferd Ram) dont run it very long with no CPU FAN or it will burn and check that fan by pluging it in someware els thats strange cpu fan is always running when mobo is on.
Put just the ram back into the motherboard, the pc will not boot without processor, ram and graphics pluged into the board, check this, if it will still not boot and you still get 3 beeps its a memory(ram) problem, and you will need to replace the memory stick.
This is a pentium 4 motherboard I believe. Check that you have connected the 2nd power supply to the motherboard which is often required due to the cpu being a higher power requirement. The PSU should have a smaller squarer plug with a clip that plugs into the motherboard. THis has caught me out before.
If not, sorry....
Do the fans still start spinning ? And did you do a CMOS clear ?
You should also try booting it without a graphics card and/or any other audio/network card, etc, so you only have the CPU and motherboard (and also try it with 1 RAM bank and without). When it beeps, it's probably alright (implicating other failing hardware).
When you hear no beeps at all (but the fans spin), it's pretty likely that the board is gone. You might want to doublecheck the powersupply and CPU nevertheless.
Try removing all cards with the exception of the video. Remove all memory leaving (1) to boot from. Disconnect power and reset the processor. If you have a boot disk or copy of XP on disk, try to boot from the CD or DVD. If the unit boots at all the problem may be the HD. If not try downloading the BIOS update for your chipset. Remove all extra drive, like secondary CD or DVD drives, Floppy or Zip drives. You may have burnt the processor but I don’t think so. Power supply is OK or you would not power up. Their are 3 or 4 supply voltages from supply, +- 12 volts, +- 5 volts and +-3.3 volts. You may have a secondary 12 volt 4-pin plug but that is for on board video. Try a boot disk and flash your BIOS, if you can. Hope this helps.
Hi sebaswis, am I correct that this Gigabyte GA-7VRX is a replacement MB? (I read your other posted questions). http://www.fixya.com/support/t1399506-computer_boot_when_power You mentioned you put your old system back together & it worked fine. If mother board is shorted to the system case you will see the CPU fan spin for a second. Most motherboards use a green led which represents there is stand-by power running to the board.(This is normal). I am unsure why your led is orange. (Its not mentioned in your manual & manual does not show the led?s location). Was the other GA-7VRX MB led always orange or was it also green? Suggest you disassemble the heat-sink from the CPU. You mentioned you installed a new XP 2500+ CPU. If a pin on the CPU was bent during installation of CPU into the socket or if no thermal grease was applied or too little to the top of CPU, either would give you: CPU fan spins for a second & nothing else seems to run. Look over the link provided below. It is a guide to how to install a motherboard. (You may not need this but Its worth going over all the steps). http://www.hardwaresecrets.com/article/145 As far as the power supply. If the MB's are the same (GA-7VRX) & the old system ran with 220W, the newer one should also function. Clarify these questions for me sebaswis. Mike
Hi Jay, Is you're memory installed in the two yellow slots? Try using only 1 DIMM in DDRII_1 slot. Page 17 in you're manual. When using only one PCI-E graphics cards you do not need to plug in extra power to the board, as shown on page 19. (Only need this additional 4-pin Molex when running two PCI-E cards). Check internal connector is plugged in item, 1 ATX_12V_2X (Pg. 23 in you're manual). (System will not boot without this). Also item, 2 main power 24-pin Molex cable is securely connected. Chassis Intrusion Header (By default is opened/no jumper). I don't like the CPU getting hot. It shouldn't. Do you have a spare heat sink & fan for you're CPU? Are you 100% the cooling system is running correctly? Lastly, here is Gigabyte's Qualified Vendors List (QVL), for you're board. Corsair 2GB is not listed. http://www.gigabyte.com.tw/FileList/MemorySupport/motherboard_memory_ga-ma790fx-dq6.pdf