Member Avatar for rick86

Hello

I can't seem to turn on my new build pc, the power supply cords are connected to the motherboard but I can't seem to manage to get it to boot. I have a 650w psu so I don't think is a matter of power.
When I try to turn the pc on it doesn't make any kind of noise, to even a single beep, zero.

This is the specs:

Mother board Gigabyte GA-Z68MA-D2H-B3
Corsair Vengeance Blue 8 GB (2X4 GB) PC3-12800 1600mHz DDR3 240-Pin SDRAM Dual Channel
Intel Core i5-3570K Quad-Core Processor 3.4 GHz
Cooler Master Elite 430 Mid Tower Computer Case

Altough im a litte bit confused about the color order for the front panel connecters, I connected them according to the color order that indicates in the board, but still it doesn't power up.

Any tips?

Edited by rick86
  • 6 Contributors
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  • 3 Months Discussion Span
  • Latest Post Latest Post by stormal1

Dani AI

Generated

Key clues from the thread: the PSU tested good in another board, the build will sometimes try to start (CPU fan flickers) then immediately reboots in a loop and never reaches BIOS, and front-panel wiring/standoff issues were discussed by , and . The symptoms (brief fan spin then immediate reset) point toward either an intermittent short/protection trip or a bad/incorrect CPU/socket/cooler installation rather than a simple front-panel lead fault.

Recommended prioritized checks (fastest to rule out the biggest risks):

  1. Minimal bench test — board off the metal case on a non-conductive surface, only CPU + cooler, one stick of RAM in the recommended slot, 24-pin ATX + 4/8-pin CPU power connected, CPU_FAN attached. Use a screwdriver to momentarily short the two power-switch pins on the front-panel header to eliminate the case switch.
  2. Inspect the LGA1155 socket (i5-3570K) visually after removing the cooler: open the retention lever and check under bright light or magnifier for bent/misaligned pins. Do not touch pins; if any are out of line, stop and request vendor/repair service — bent socket pins commonly cause immediate POST failure or weird reboot loops.
  3. Test the CPU fan independently (move it to a system fan header or power it from a Molex adapter) to confirm the fan itself and its connector are OK. Some motherboards will halt or reboot if the CPU_FAN header reports no RPMs.
  4. Check for case shorts: confirm only manufacturers’ standoffs are used and align with motherboard mounting holes; look for metal shavings, extra screws or traces of contact on the PCB underside.

If the problem persists after the above, attach a simple PC speaker for POST/beep codes, try a different known-good RAM stick, and document observations (beep patterns, LED indicators). If inspection shows bent pins or the board behaves the same on bench with correct standoffs and all power connectors present, the most likely next step is RMA the motherboard.

Recommended Answers

All 13 Replies

Member Avatar for Wil 0' Wisp

I think you will should check after removing anything you have installed to the board! Inc memory modules bareboard is what you are after apart from the CPU plus H/sink/Fan
1) The Motherboard diagram for what exactly the connectors pins are pay attention to the 'PWR' connector
2) If you have a 'spare' microswitch try connecting it to the board PWR connection as suggested above.
3) Check to ensure you have the Main power connector in the right way around and the 12V auxilary power connector in and ditto the right way around.
4) If possible check the PSU, use an older one (big enough to power the board) if available or get the PSU checked to make sure it is working PSU correctly PSU checkers are about £24
5) Check the board out of the case resting on the original box NOT the bag(!) it came in. Its got to be plugged in as was in the case, use the power switch connector. It is a balancing trick! to get the components in the right place.
6) Are there any teltales LEDs on the board some do some don't have them. Do they light up.
7)Take the M/board back if possible and get them to check it?

Member Avatar for rick86

Thanks for the tips

I've already tested the PSU in another board and it worked without any problems, it powered up normally so it's not PSU issue.

Here are some pictures I took of how im connecting the frontal connectors, I connected according to the diagram brennyt posted, but it still not booting at all.

http://i1300.photobucket.com/albums/ag97/rick861025/frontal1_zpsc72cd7a6.jpg
http://i1300.photobucket.com/albums/ag97/rick861025/frontal13_zps5a562442.jpg

Edited by rick86
Member Avatar for rick86

Any tips of what im connecting wrong?

Edited by rick86
Member Avatar for brennyt

take a picture of your whole motherboard so we can take a look

Member Avatar for rick86

Hello again, i managed to power up the pc, but now it reboots endlessly, it won't even go into the BIOS, after i turn it on, after a few seconds it restarts and this goes on a loop.

I also noted that the cpu fan wont' spin when I turn on the pc, it kinda looks that is about to start spinning but then it stops.

Might be some kinda of short maybe? any tips?

Member Avatar for Wil 0' Wisp

You need to make sure the CPU fan is connected! You will be/may have cooked the Processor. :-(( Test the Fan! Work simple and smart, remove anything connected to the Motherboard NB NB NB before you do make sure you which way around it connects and what and where it connects to. Make simple drawing and anotate where Pin 1 is and what cable you have connected to it. Take pictures! but make sure you can see the markings on the board. the one you have taken is good but the connector markings are 'flashed ' out. Make sure you have the (right) Motherboard connection diagram for the board.

OK done all that? Now reset the BIOS/CMOS you will have to check where the reset is and check to make sure you use the correct method, in the correct sequence. Some are just 'short pin1x to pin2x, some are fit jumper to 2x and 3x pins, turn the power on wait 5 sec turn of un jumper pins, return the jumper to pins 1x 2x. some have no pins at all a little switch (old) or two solder mounds to short across

Member Avatar for Wil 0' Wisp

Does the PC speaker work? has it got one? Does it make any noises, beeps. if it does write sequence down and look it up under beep codes, check which manufactures BIOS as some of the codes differ.

Member Avatar for nickpap

hi, i had a similar problem recently and i eventually solved it by removing the motherboard and re-screwing in the screws and standoffs in there correct positions. it turns out i put too many stand offs under the board and it was causing the board to short.

hope this helps?

Member Avatar for nickpap

even one out of place standoff or screw might cause this to happen..i remember the fan would start for a second then stop...sounds just like my problem. i even stupidly brought a new power supply thinking it was damaged!

Member Avatar for emmakareem

My HP PC won't start up.

I have removed the motherboard and refixed it but it doesn't solve the problem.

The CPU FAN usually start slows but it will later will started runing very fast.

Member Avatar for emmakareem

My HP PC won't start up.

I have removed the motherboard and refixed it but it doesn't solve the problem.

The CPU FAN usually start slows but it will later will started runing very fast.

Member Avatar for stormal1

It is not unusual for the iCore Intel CPU's cooling fan to run slow upon initial startup,
until the motherboard sends it's first beep to the onboard speaker to signify full power is available.
The process usually takes a few seconds.

Edited by stormal1 because: typo
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