one long beeb and two short beebs Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information,some couse of that issue is New hardware conflicting with old hardware or New hardware conflicting with old hardware or Connections not connected or connected properly or other hardware issue.Best solution is
If any new hardware has been recently added to the computer, remove that hardware to make sure it is not the cause of your issue. If after removing the new hardware your computer works it's likely the computer is either not compatible with the new hardware or a system setting needs to be changed to work with the new hardware device.Remove any disks, CD's, DVD's that are in the computer and if any USB devices (ipods, drives, phones, etc)
before all that please
Make sure all fans are running in the computer. If a fan has failed (especially the fan for the CPU) your computer could be overheating and/or detecting the fan failure causing the computer not to boot.
If you continue to to receive the same problem with all the above hardware removed attempt to disconnect the RAM
from the Motherboard
and turn on the computer. If the computer has a different beep code or if your computer was not beeping and is now beeping turn off your computer and try the below suggestions. Making sure to turn off the computer each time you're adding and removing the memory and then turning the computer back on to see if the suggestion resolves the issue.
- Re-insert the memory into the same slot.
- If you have more than one stick of memory remove all but one stick of memory, try rotating through each stick.
- Try one stick of memory in each slot.
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