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No Display - No Post - No Boot |
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Your PC sounds like working, but you don't see anything on your screen? No POST: Nothing shows up on your screen as soon as you power on the system and monitor.
No BOOT: You see some text message on your screen where we call it BIOS POST. After this post the system suppose to BOOT to your operating system or any bootable device attached.
Some steps to troubleshoot NO POST are:
- If you moved the system, monitor, or add new hardware into the system then check for connections or reverse the task.
- Did you hear any beep sound at all when you power on the system. Did the system beep at all before?
If yes then common beep sounds are:
| BEEP CODE |
MEANING |
POSSIBLE CAUSE |
| 1 Short single beep |
Normal POST |
System is ok |
| 1 Long, 2 Short |
Video adapter failure |
Bad video adapter or memory |
| 1 Long, 3 Short |
Video adapter failure |
Bad video adapter or memory |
| Repeating (Endless loop) |
Memory error |
Bad memory or bad connection |
| Repeating High, Low beeps |
CPU failure |
Bad processor |
- Check if it responds to your keyboard, i.e. pressing Num Lock, Caps Lock or Ctrl - Alt - Del.
If yes then it could be your graphic adapter, cable or monitor problem.
Try a different monitor, or connect yours to a different known working system.
- You may have to open the system. If you have more than 1 stick of RAM, test one at a time by installing it on the slot next to CPU (refer to motherboard manual, as some motherboard requires minimum of 2 slots to work)
- If you're over-clocking or tweaking BIOS setting, then you have to reset the CMOS (refer to motherboard manual on how to reset CMOS).
If above steps are verified and doesn't work:
- Read other articles.
- Contact us for online support, phone support or schedule a visit.
Some steps to troubleshoot NO BOOT are:
- Depends on error message showed on your screen, read on symptoms below and follow the one applied to you.
- Operating system not found or ntldlr is missing.
The system is trying to boot from non bootable device or wrong boot device. If you have external hard disk, thumb drive, IPOD or any memory card/reader then remove or unplug them and try again.
- Operating system not found.
If your system is configured with RAID setting, make sure that the RAID setting is still enabled and in healthy condition. If you have more than one hard disk drives in your system, check boot device or hard disk drives' priority in BIOS before try to boot again.
- Try boot from CD or floppy disk.
Known bootable CD is: Windows installation disc, Custom bootable CD, Linux Installs or Live CD, Diagnostic CD from hard disk manufacture.
If above steps are verified and doesn't work:
- Read other articles.
- Contact us for online support, phone support or schedule a visit.
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