PC will not boot, power and fans turn on, no video, no post.
I have a DFI UT NF3 250GB motherboard. This past week, I've left my computer running 24 hours for the past few days--usually on for only a couple of hours a day. I've experienced my monitor flickering when booting into Windows XP. Not sure what that was about, but I suspect that I didn't have enough power for all the components that I had connected at the time (DVD burner, SATA drive, ATA100 drive, X1300 Video Card). Well, I hooked up a laptop SATA drive and a My Book USB drive also when I started the 24 hour run, because I was transferring files from the laptop drive to the My Book drive. Last night, I discovered that the computer would not start up when I pressed the power button. I flicked the switch off and on on the PSU, then pressed the power button. It started up, fans spun, hard drive buzzed, dvd drive spun, but no video and no post. Any ideas?
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Re: PC will not boot, power and fans turn on, no video,...
LEAVINGYOUR COMPUTER RUNING ALL THE TIME WILL NOT MATTER.
NEED MORE INFO
SHUT DOWN THE SYSTEM, MAKE SURE EVERYTHING IS SEATED, REMOVE THE MEMORY AND REINSTALL THEM, REMOVE THE CONNECTION FROM THE HHD AND MOTHERBOARD RE INSTALL THEM, REMOVE ADDITIONAL BOARD AND CARDS, UNPLUG MONITOR AND PLUG IT BACK IN, REMOVE ANY EXTRA USB CONNECTIONS UNTIL YOU TRY RESTART THE SYSTEM.
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Hi richardbyers, three short beeps means there is a problem with your memory. (Base 64K memory failure). Unplug the power from the PC. Open the case & touch the bare metal on the case to discharge your self. Remove the memory & reseat it. Leave the case opened & re-connect the power cord & try booting again. If you still hear three short beeps, shut the system down again as mentioned above. Gather some house hold alcohol & a couple cotton swabs. Drip a drop or two onto a cotton tip & wipe the memory's contacts, both sides & do not touch the contacts with your fingers during re-install or cleaning. Blow the memory slots out with canned air or use a clean paint brush. Insert the memory again & connect the power cord. Boot the PC. Try this first. If everything works out than good. If the problem does not clear its self let me know.
This causes if you havnt connected the power cable coming from th power button to proper jack or pin.
Check out the pin in which ur power button cable is inserted.
Does your system boot when u press the restart or shut down icon from ur windows (OS). If it is not letting ur system to boot then you've been attacked with the Worm viruses. These viruses dont let ur system to boot because they keep their process running untill ur power is off.
Hi steve, PC repair is trial & error. I suggest you replace the power supply or test the power supply in another PC that also uses 4 SATA drives & two PCI-E slots for starters. Two boards with the same problem is odd. You must have the CPU & fan connected, memory installed, ATA 24_pin main power plugg connected (Page 17 in manual). 4-pin_12v power connected which is located (Just to the left of DDR1 memory slot). Looking at you're board the power supply should be no less than 500w.
CPU must have thermal grease between CPU & heat sink.
Even though you have fans running & LED's on & flashing, the power supply seems to be the first item to check. Make sure the bottom of the motherboard is not touching the PC case.
Try the above & post you're finding here.
why don't you try plugging strait into a wall socket, (make sure the wall socket is good). The power strip my be faulty. If your system still does not boot. Got a spare power supply? We've got to work from the wall socket back to the board. Some power supply's have a fuse internally. Your's may have blown. Almost every PC at one time or another encounters a system power failure, (lights out in the whole house deal). It's the spike that we all worry about. I'm not suggesting you run out & buy a new power supply but you can take your's apart look for a blown fuse. Post back your findings. Let's hope the power strip was the trouble maker.
Try doing this. If you can, Un plug your computer, then remove the fan from the Heatsink. Using water and Dishwashing Liquid soad mix in a container. Soak the fan in the solution for 1 hour. Then rinse it using running water. Then sun dry it for 3 hours. Then re-affix it to your Heatsink!
Hope this helps.
I suspect a hardware failure; I would pull off everything you can to make this as basic a PC as you can. Hardware POST checks, fans and LEDs are good to do very basic tests and elimination but are not definitive tests. If it still doesn?t work I would try using a power supply tester or switch out with a known good, followed by the RAM, processor and video card leaving only the motherboard.
If you get this far and the problem is still there then your failure is the motherboard. Look for damaged capacitors with rounded tops or corrosion at the base. I?ve had two 2004-2006 era Dells refuse to complete the POST because of defective capacitors just recently.
If still no luck you might try buying a pre-POST diagnostic card ($50 and up). If you don?t want to invest in that you should consider taking your PC to a shop that does have one. I know it runs again most of our personalities to pay a tech but consider this. I?ve run into lots of people who spend weeks and big bucks troubleshooting a problem someone with the right equipment can diagnose cheaply (overall) the first time. Without the test equipment or a similar PC you can use for parts you?re going to have to start buying parts one at a time in a process of elimination.
Let us know if you have any more questions or comments and please don?t forget to rate the posting.