Computer will not start from any bootable device after completeing the Power On Self Test (POST).

SOURCE: No video on boot up!!

have you tried to uninstall the vedio driver and reinstall it then let me know.go to my computer icon right click it > go to properties >hardware tab > device manager and check if there is any yellow mark showing.kindly do this in starting your computer in safe mode.

SOURCE: Computer Won't Boot (Anything?)

ok sounds like a bad power supply , i would get a new one

Ginko

• 19396 Answers
• Posted on Sep 17, 2008

SOURCE: my computer does not boot

No bios no post and no power lights on disk drives means hardware problem.

Either call a technician or try the following if you feel you can do it yourself, beware , there is always risk of damaging your PC on DIY.

unplug the computer, open PC and remove all plugs and internal and external devices, leaving only a minimal set of devices.

Start the motherboard with only Power adapter , one RAM module, and video card and screen connected. Unplug all disks and external devices, remove all pci cards.

If it still does not start take it to a repair shop, you may need to replace power supply, motherboard or ram.

SOURCE: ASUS Motherboard Startup

beeb shows that the memory RAM gone out of order/dislocated, check it.

SOURCE: Turns on, no bios no screen, just beep.

Now the question is, when the computer first starts up and you hear the beep, that is where it will tell you what your problem is depending on the beep you get.

One Long and one Short Beep = Motherboard issue
One Long and Two Short Beeps = Video (Mono/CGA Display Circuitry) issue
One Long and Three Short Beeps = Video (EGA) Display Circuitry
Three Long Beeps = Keyboard error
One Beep, Blank or Incorrect Display = Video Display Circuitry

If it is the last one, then try doing the following.

1. Disconnect external devices = Unplug everything from the back of the computer and then restart it. If it starts up, then it is one of the peripherals that is plugged in. You will then need to turn off the computer and gradually plug each one in and turn the PC back on to see if the peripheral is the problem. If that isn't the problem, the proceed to #2.

2. Cable check = With the computer shut down, make sure all the cables within the PC are attached properly. Once you finish doing that, turn on the PC and that isn't the cause, continue on...

3. Disconnect all expansion cards = Sometimes another expansion card can become loose and cause various amounts of issues. Remove each expansion card (clean them if necessary of dust) and replace them. Turn on your PC. If it doesn't start move to the next step.

4. Disconnect all drives = disconnect the data cables from the CD-ROM, hard drive, and floppy drive from the motherboard (make sure to mark them so you remember where they plugged into). This will either remedy the situation or you will see an error when you reconnect each device one at a time to determine which device/cable is causing the issue.

5. Remove the RAM = Loose or bad RAM can cause PC's to not boot or boot incorrectly. Remove each stick and replace them one by one alone in each memory slot. If the PC boots up in each slot, then your golden, but if a slot is defective, then your motherboard is damaged in that slot. You can still use the other slots as long as you use the defective one. If a stick of RAM doesn't allow your computer to boot up, its quite possible that stick of RAM is defective and will need to be replaced. But make sure you try out all the other options before throwing away a stick merely because the PC doesn't boot. A faulty stick can be the problem, but if the problem lies elsewhere, you may be throwing away a good stick of memory thinking it may be bad.

6. Disconnect and reconnect the CPU = Most CPU's are easy to remove, but if you aren't familiar with it. Read your manual on how to remove the CPU. Once you remove it and re-seat the CPU, reboot your PC.

7. If after you have tried all the previous steps and your PC still doesn't boot, then it is most likely that your motherboard, CPU, RAM, or power supply is defective and must be replaced. If you are unfamiliar with fixing the problem (or have never built your own PC) you can opt to have someone repair it or you can start with the cheapest option of purchasing a single stick of new memory and see if the memory was indeed the original problem. If the PC still does not boot with new memory, then it is most likely your motherboard, CPU, or power supply that is dire straights.