My Gigabyte GAP31DS3L mobo wont boot

February 4, 2012 at 15:06:49
Specs: Windows 7
Iv checked and replaced the PSU with new one. Iv also bought new cooling fans also 2 new processors.(Pentium d 820 2.8 ghz\2m\800 dual core 775 socket) also tried my old dual core 1.6Mhz, but still wont work. Iv rebuilt this system and followed all the wiring diagrams, yet still the fans Dont start.

Iv got a good grease on the processors/cooling fan. Iv also checked the two ram disc's , they are working(800mhz) Also when I power up lights turn on to my post card checker, also lights flicker on my keyboard saying I have power. I have also connected a small extra fan. When I boot up the fan starts for about 5-10 secs, then nothing, so mobo is getting power?
I bought another 2nd user mobo, but still same problem, What am I doing wrong.Or is it that the 2nd mobo is naff as well?.

Please help.

Thanks Sean


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#1
February 4, 2012 at 22:35:16
POST card checkers are a waste of money.

What do you mean by "good grease on the processors/cooling fan"? Does that mean a LOT of grease? You should have used a thin line of grease across the center of the CPU & it should NOT have been spread around. Too much grease can prevent a system from booting. Here's what it should have looked like before locking the heatsink in place:

http://www.circuitremix.com/images/...

If all else fails, do what you should have done right from the start - Benchtest!

http://www.techsupportforum.com/for...


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#2
February 5, 2012 at 04:10:11
Thanks for that. I did only use a bit of grease . Im still having problems.. My gut tells me to get another mobo...


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#3
February 5, 2012 at 05:19:24
IF you just like spending a lot of money, just keep purchasing parts, eventually after you purchase two or three of nearly everything, you may get it to work. (If you don't mind spending the money, why are you bothering with an old system, just build a better one from modern NEW parts)
The right way is to strip everything down, remove it from the case (eliminates possible shorting on the case) and follow Bench Testing procedures. See above or Google 'Bench Test Computer Hardware'. EXAMPLE: If you get a beep with only Motherboard, CPU w/heat sink, keyboard, mouse, monitor (using onboard video if available), put in memory. If you then post to BIOS set up, then all is working up to that point. If you add the hard drive and you get nothing, then the hard drive is bad, replace that and retest. If you did not get the beep (verify you have a motherboard speaker), remove the monitor and graphics card (if using one) and see if you get the beep then. The process of elimination in a step by step manor is the only sane thing to do here.

You have to be a little bit crazy to keep you from going insane.


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#4
February 5, 2012 at 11:53:22
Iv done what you suggested, & bench tested it. I got to bios screen then lost power, and have been unable to get back to it. 'I'm going know where fast. Can get the fans spinning but that's about all . Cant get in bios, as it wont show anything, on my monitor . I have even tried my spare Gt850 graphics card. Fan are spinning fine. But no bios screen. I have to run graphics via Graphics card, as no on-board graphics on this Gigabyte GAP31DS3L mobo.
I dont understand why Im having problems with the wiring to the tower system, as they have been fine when I switched the Tower units earlier this week...
Thanks you for all your comments(Help) anyway..

Sean


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#5
February 5, 2012 at 15:11:13
If it booted to the BIOS momentarily before cutting out, then it is either the CPU heat sink/thermal compound is not properly applied or attached (immediate overheating), or the power supply is either bad or not capable of running your system as it is set up (basic system + graphics card).
List ALL you specs including makes and model numbers of all of your hardware, PLUS the full specs of the power supply (the overall Wattage plus the Amperage on the 12 Volt rail(s) is the most important). and we may be able to determine this and other possibilities.
Find your CPU on this list and follow the instructions for applying the thermal compound:
http://www.arcticsilver.com/intel_a...

You have to be a little bit crazy to keep you from going insane.


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#6
February 6, 2012 at 12:01:45
Hi ,

The PSU is a Storm 500watt.with 12volt technology. Version 2.0 psw.over voltage protection +3.3v,+5v + 12v. EMI filer built im. for socket 775, AM2 + all backward technology . 3.3v= 28amps, +5v=3.8amp, +12v=20amp, -12v=0.8amp ,5vsb= 2.0amp
CPU is intel core 2 duo. 6420 SLA4T, 2.130 MHZ/4m .also Intel Pentium D 820 2.8Ghz\2m\800 dual core S775
Mobo is Gigabyte GAP31DS3L
Ram is Crucial 800Mhz 240pin, x2
HD is Maxtor model6L 160gb
Cooling fan is intel core 2 duo with heat sink , low profile fan.
Thermal compound paste is Gold thermal paste grease.
O\S is Windows 7 32bit.

Hope that is what you need..

Regards Sean


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#7
February 6, 2012 at 19:32:02
I do not see a 'Storm 500' online but i do find a 'Blue Storm Pro 500' and a 'Blue Storm II 500' and both have relatively high 5V and 3.3V with dual 12V rails at 18Amps each. I do not find much info on the 'GT850' graphics card and you did not list the other graphics card you were using. Going by the specs you did supply (the 5V amps you listed does not make sense unless that is the standby 5V) and the ones I found, you may not have enough amperage on your 12 Volt rail to power the system and the graphics card. List the other graphics card and recheck the power supply numbers, but that is what it is beginning to sound like.
For many modern graphics cards, especially those suitable for gaming you should look for power supplies with single 12 volt rails with amperage ratings significantly higher than that (40+ amps on one rail), and certified 80% efficient.

You have to be a little bit crazy to keep you from going insane.


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