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Motherboard not booting up, Blue flashing CPU LED

I have a gigabyte GA-EP45-DS3P mobo , when powering up the CPU LED starts flashing Blue, I get power to all components but nothing happens.
Like the "lights are on but no one is home ". the power light is on but no graphics. Not sure if it is the Mobo or the CPU
Any ideas

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  • cardinal7 Dec 12, 2008

    Hi electech1,

    I checked , and reseated the RAM , still the same issue
    The CPU fan is spinning
    I tried without the RAM and the power sequence changed such that the PC would immediately power down and then retry to power up.
    I have also noted that there are a number of CPU LEDs that indicate the load on the CPU, these are all lit up, as if the CPU was operating at maximum capacity

  • cardinal7 Dec 16, 2008

    thanks to all who may have read and pondered my problem. I have shelled out a few bills and had a diagnosis completed. the result is a dead mobo, am now sending back to gigabyte under warranty (only in use 3 months) but am dismayed that the turnaround time is projected to be 6-8 weeks, with no replacement mobo (unless I shell out more bills for the privelage). not sure that I would get better service from any other supplier so am not complaining too much. just hope the repaired mobo is in better condition that the original. Will live with the oooooold laptop for the duration of the repair.

  • METaylor56 Dec 25, 2008

    I have the same problem also need help leds are green yellow and red as if the cpu is strained but has'nt been able to boot since putting system together

  • sargek Jan 14, 2009

    Same board, same problem. RMA'd board back to Newegg based on dozens of posts similar to ones like this. Very disappointed with Gigabyte and wish I would have seen these posts before I bought. This is my first upgrade in 5 years and I have always used Asus - thought I venture out and try something new. Oh well...

  • jason May 11, 2010

    have you made sure the ram is seated good?

    or try without one?

    also does the fan on the cpu spin?



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Posted on Jan 02, 2017

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SOURCE: will not start

I'm guessing that your computer was not working before the PSU change....

To find out what your problem is you have to Eliminate as many possible sources as you can, hence remove all your PCI cards and drives, (not your graphics card though, memory or CPU)

Check boot again... if it still fails to boot then it's either the CPU the MEM or the Motherboard....

if it does boot then plug in some of your cards, (but not all) and check again.... if system fails again, systematically check each card that you re-inserted.. this should help you find the culprit...

Posted on Dec 05, 2007

  • 5 Answers

SOURCE: Motherboard not powering up

check the smps its purely smps problem

Posted on Jul 22, 2008

  • 33 Answers

SOURCE: motherboard


Yes you can. Any DDRII RAM can function at 1.8v.
Every memory module has profiles written into it, this allows it to function at various speeds and voltages, and 1.8v is the default voltage for DDRII.

Voltages above 1.8v are used for overclocking, to take full advantage of high speed DDRII memory you should manually set the voltage and frequency in your motherboards BIOS (accessed by pressing DEL or F1 during boot), if your motherboard does not have options to set these parameters manualy then your memory will function at the default speed and voltage

Hope this helps!

Posted on Oct 02, 2008

  • 414 Answers

SOURCE: no display on monithor cpu fun runs &but mobo led

do it only if u r a professional..
assuming that the system bios hs not been flashed or updated in a wrong way..if so u gotta replace the m/b..
1st see if the ram(s) is loose/ n resit it..
check for ac main supply and check all the outputs of smps viz. 0v (black~ground); +12v (yellow); +5v (red, green~ps-on, violet~pg & grey~sb); -12v (blue); -5v(white); +3.3v(orange)..if faulty try repairing or replacing the power supply with a standby n see..
if all above are ok..check the cmos/system battery..(above +3v)..
check the cpu fan rotating and the cpu generating heat..try replacing the cpu with a standby (if no heat is generated)..
there may b a chance for m/b's crystal clock generator to b faulty..try repairing or replacing the m/b with a standby..
there may b also problem with ur monitor or display adapter, try replacing with a standby..
hope it'll b enough to solve ur problem..
seek professional assistance of ur system admin/vendor....

Posted on Nov 03, 2009

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Please take a moment and rate my help for you


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