Some days ago i got a strange issue with my computer which has been working for about a year.
when i moved it to another room like 5 meters i couldn´t boot i opened the case i saw that the power and reset button on my Motherboard what blinking instead of being constant.
So i took everything out of my computer and put it back together, still had the problem so i started moving around on my ram and suddenly the lights very constant and i could boot up.
Now heres the really strange thing the morning after when the computer had been off for 8-10 hours the same problem occured i did the same moved around on the ram removed them completely and it worked again...
next morning after the computer had been off for some hours guess what... the same problem... just this time nothing worked i cleard the CMOS at the jumper and the battery no results double or tripple checked all connections and maked sure the rams was seated properly, reseated the cpu and cooler. Everything was fine.
so i tried to boot up with only Cpu Ram still flashing lights even when i took the Motherboard out of the pc case to make sure it was not shorting somewhere it would still not work.
I believe it´s either the PSU or the Motherboard which are fried but im not sure as it works sometimes.
(Ps. i did not overclock anything at anypoint)
My build is.
Asus P8P67 Deluxe
750w Thermaltake Psu (2.5 years old)
2x gainward golden sample GTX 560ti sli.
Intel core i5-2500k
16GB Kingston HyperX 1866mhz DDR3 Ram
A quite random cd/dvd reader.
1TB westerndigital Hdd'
I would really appreciate some advise as i´m completely lost....
Sounds like your power switch.. or.. fluctuating power. I have no clue.. you need to test your components seperately. Maybe if you can try another power supply to test with your motherboard..? Honestly im lost too. Cleaning your board might help.
start will doing a bare bone of the pc. if your mb has onboard video pull both 560ti and all the ram but one stick. no hard drive or cd-rom connected. if it boots and powers on fine it may be something is shorted or not seated. if it still gives you an issues try pushing back in the 24 and 4/8 pin atx plugs if there not clipped it they can walk out. if the mb does post fine then i would power it down and install one video card. if it post fine power down and install the other. if the error comes back with one or both of the cards in then it sounds like the power supply has failed or you have a bad card.
with ram i seen dead slots on mb. to find that out you use one know good dimm and you walk it into each slot and run memtest.
if the pc flakes out or does not boot with know good ram in one or more slot..bad ram slot on mb. with the pci video you need a know good video card. then you try the pci slots. if the video card works in your pc without issue. you can the nsay it might be your video card or power supply. what you have to do it put your video card into another pc and see if the error happens on another pc. if you have to start with the onboard video and one dimm and see if it works fine. then add the ram till you max the ram out and run some memtest and burn in on the bare min pc. if it a power supply issue you wont know it unless you use another ps.
So right now i got my motherboard in the box it came in with the cpu and cpu cooler 4/8pin connector and the 24pin connector and 1 ram stick and its the same problem flashing reset and power button on the mobo and no boot...
To panicmaster- i did try this the other day and my psu fan stated spinning but does that mean that it´s working properly ?
Okay so today they sent my Motherboard back and said that it worked fine in their testes so now i´m back to scratch once again.... is it possible that it can be the PSU even though i can make it power up my old motherboard with only cpu and ram connected, or can it be a CPU failure even?
depends on the mb and the load on the ps. could be the ps or a bad video card or a short.
if with no ram and no video card just a power supply and cpu...if the mb has flashing power led..i would try another power supply. (make sure there no fans other then the cpu fan plugged in then plug one fan in at a time.) check that the case connector for usb are connected right.
newer mb use digi vrm for power the older mb use a lot of analog caps. older mb can handle ac ripple a lot better then the newer mb. my bet is that the power supply can output the voltage needed to run a power supply but it a dirty output..the newer mb does not like it but the older mb can.
i got a theard going on another forum and someone there suggested that it was my intergrated memory controller in my i5 2500k that was the issue what do you guys think about that suggestion? your suggestion makes perfect sense too i would be happy if i "just" had to buy a new PSU as my current one is quite old and only at 750w
with the bread boarding of the mb did you put one dimm in away from the heat sink..sometime with heat sinks they can put to much pressure if they move onto a ram stick and cause the ram and or memory slot to short out. check the ram/pci slot for any dirt or bent pin.
yea i tried every single slot with all of my 4 ram sticks and i checked the ram and pci slots and the people at the shop i send my motherboard back to did so too and it worked just fine for them. so the issue has to lay in PSU or my CPU