ASUS Z97P fails to start after change of EPU to disable

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Serafim Dahl

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Jan 31, 2015
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I have a new asus z97P motherboard with an i5-4690k and 8 GB of ram and a 120 GB SSD + 3TB HD running xubutu linux, all in a fractal design define r5 with a fractal design 750 w psu.
When i wanted to go to advanced mode in the bios,it concluded that I wanted to disable EPU protection. Not knowing what it meant I thought it may be OK, the bios wouldn't let me do something to harm the system (I thought). Instead of restarting it went dead. What to do?
 
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I tried it (more than once) including following procedure and clear the RAM by moving the CLRTC jumper but after I moved the jumoer back in the correct position, reinstalled the battery, plugged in the computer and I try to start it again, there is a short surge of power and then it dies. LEDs and screen flicker once and then ... dead. Did I crash the board or the CPU or both?
 
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I'll try that, so far I tested all other components (installed an old mobo from an old disassembled computer) so now I know it's either the mobo, the processor or both. Anyways, the guide seems appropriate. Actually, the computer as it is now, with an old Fujitsu D2990-A3 mobo, an i5-2320 and 8GB 1333MHz primary memory, seem to run as fast as the possibly crashed setup did before the crash.
I'm on that computer now 🙂. Be back with test results and hopefully, a solution.
 
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http://www.tomshardware.com/faq/id-1753671/bench-troubleshooting.html[/quotemsg]

Hi,
I followed your bench-troubleshooting scheme with a cheap pentium processor at first and when all worked well, I examined the i5-processor with a magnifying glass and found a slight miscoloring on two pins. I cleaned it off (very carefully) and made a secondary test with that processor and it works. I still don't know exactly why it failed earlier but I may have been a little careless when mounting things in the computer case, bent something a little or whatever, maybe fastened the liquid cooler a little too tight.
In any case, your scheme worked perfectly and I'll reassemble the computer ASAP (carefully).
Thanks a lot. Saved me a bundle.
 
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Finally, however, it turns out that one of the conductive tracks on the motherboard is damaged so that, if I connect a graphics card to it, it fails. I tried several different GTX cards I have stored away, and that I know are working and whichever I connect the board fails. I'll get a replacement from the shop that sold it to me.
 
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Finally, the computer shop that sold me the motherboard claims that there is a processor socket peg that is not entirely in line with the rest of the pegs and also claim that it is not their fault and, consequently, it must be mine. So, bottom line is that they will not replace the motherboard and I face a loss of $100 and they face the loss of a client that bought hardware for $2700 over the last couple of years. So, in the end, this didn't save me a bundle.

I have built many computers over the years and this is the very first time that I had a warranty issue. Guess if i'm pissed...
 
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So, now that I need to buy a motherboard (from another shop) and given that I am not a gamer but rather a programmer and that I still will use an ASUS Z97 - which ones shuold I choose from? I know that you run a Hero but that's for gaming?
 
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😉 I got the Hero(s) as they are and were the best available, I'm not a gamer, have lots of friends, family, employees and clients that love to play on my rigs, but they are for business and demonstrative purposes. In addition to builds, repairs, upgrades, I bring in all kinds of projects that are rather compute intensive. A good alternative is the Z97-A, been very popular with my clients for both gaming and business use
 
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OK, I got my Hero board and now I have a (hopefully last) question. In spite of having built computers since way before modern time motherboards (I'm 69 but still working), I never ran into this kind of problem before. I meticulously examined the new motherboard and also the components I had mounted on the ruined Z97-P board. As I have a problem with my left eye, I use a 5x magnifying glass with built-in LED light to be able to get to the smallest details. When examining the i5-4690K processor, I noticed that some connection pegs have caught a tiny amount of dirt but I don't understand why or from what. Can I use a cotton swab (a small pin with a tiny cotton bud at both ends) and some kind of alcohol to clean it? I used just the cotton swab before but it didn't seem to do the trick. Or .. will that damage the processor?
 
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Some extra info. When writing "connection pegs" I meant the gold-plated pads on the underside of the processor. It seems to be some thermal paste residue. I May have (clumsily) placed the processor on the tha cloth that I used to clean off the last thermal paste residues from the top side when removing the processor from the damaged board.
 
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Yes it does, thank you.

How do we fix this? I have managed to place two questions in one thread and have recieved two solutions. I'd like to mark both your answers, the one already marked as a solution AND your last answer also as a solution, but to the last question.
 
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It turns out that I have a last question and some info. Start with the info.

I finally got time to rebuild the computer with a Hero motherboard and 16 GB of primary memory. I also added a EVGA GTX 960. At first it didn't start but thanks to the error display I found out that the mem sticks were not inserted well enoguh (deep enough in one end). Then it started, accepted to optimize the settings and, voila, running smoothly and very fast. I set the overclocking to auto so it never (so far) gets to the upper limit.

Many thanks for good advice!

Now my question. The case (Fractal Design Define R5) has its own fan control but BIOS demands that I connect a CPU fan. I find it too noisy so I would like to make BIOS ignore the CPU fan or, if that is not possible, change the lower limit for the fan speed. If I run it entirely with the case fan control I can hardly hear the fans and the temperature is around 37 C.
 
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