Fried mobo by overclocking?

[Gretzky]

Well i had a idea one day ( i got many stupid ideas ) to raised the fsb on my mobo. Now i dont recall how much i raised it but when i rebooted my comp it would freeze after a few seconds of use. I tried going into bios but it would freeze after a few seconds, i tried letting it boot into windows but it froze on bootup. I even tried formatting but it froze in fdisk.

I tried taking out every pci card out and all devices except mobo,cpu, videocard and memory. It still was freezing after a few seconds, so i tried different ram and that wasnt the problem since it froze anyways. So i put in my old STB Velocity agp card and it still froze after a few seconds. So it left me with cpu or mobo. I bought a cheap BioStar mobo and tried it with my current CPU and the freezing didnt happen.

But the mobo doesnt look fried or smells fried. I set the bios to defaults and it froze anyways. Also this was a MSI K7T Pro2a mobo. Operating system was on Windows98, 330w Sparkle PSU. All my specs are up in the link below just different mobo.

 

[Jwyatt]

Did you try reseting the bios? Teres a jumper usually near the battery. There are 3 pins there. The jumper is on 2 of them. Move the jumper over one pin so its on the middle and the next one. That will take your mb back to safe settings and let you play there.

Another way is to hold the insert key in when you power up the board. This sometimes works, and sometimes doenst.

 

[Jwyatt]

Its called JBAT on that board. Just pulled my manual and looked it up. Its hould be about an inch or so below the battery. Move it from the lower two pins to the top two pins for 10-15 seconds. Then put it back to the original position. Reboot and OC a little less this time

 

[Gretzky]

so you think the mobo is fine? I can put it back in?

 

[Gretzky]

oh and im sorry to mention but i tried pulling the battery out and wait like 5 secs before putting it back in. But i didnt try the jumpers

 

[Gretzky]

im sorry for the spam messages but im looking at my MSI mobo right now and the jbat jumpers is already set to the top 2 pins.



its like this: ||| and the last two pins are taken by the jumper.

 

[Jwyatt]

Taking the battery out for a few seconds wont clear the cmos. The capacitors on the mb will hold enough juice to keep it alive.

What the jbat jumper actually does, or used to do, is shorts the battery connection. Im not sure it still does that, but on the older boards it did. Move it to the other position for a few seconds then back, but if your using a K7T266apro it should be in the bottom 2. Not sure about the other k7t mbs though.

Anyway, try to do that. If theres any way for you to connect it without installing it all back in the case i would try that before going through the headaches of changing the MB.

You might be able to do this with the PS in the case just pull the connector for the MB outside. Find the header where you would hook up the power switch to. You dont have to dissconnect the one from your current system. Just short the 2 leads with a screwdriver or something. If the system posts and is at the correct speed again your back in business turn the power supply off from the back to shut it down. If your in the bios, dont turn the PS off exit the bios first. then after post turn it off.

dont worry about a HDD. All you need to do is post and jump into the bios and see that the fsb is back to default. You can see this also after it posts by looking at the cpu speed.


Just make sure you have the MB on something non conductive. Most people sit them on the anti static bag it was shipped in. DO NOT try to run the board and cpu without a heat sink though. Many 'o peeps have fried the cpu's doing that.

 

[Jwyatt]

Dont worry about the spam.. I never edit my posts. I always add to them.>Trying to Powerlevel my user rank!!

 

[Jwyatt]

See there. I did it again!! hehe

 

[Gretzky]

lol thanks. Someone also told me to take out the cmos jumper but i cant seem to find it on my MSI K7T Pro2a mobo

 

[Jwyatt]

The JBAT is the cmos jumper.

 

[Gretzky]

ok i tried what you guys told me to do and the comp still ffreezes. Now i got a real dilema trying to get the led wires in order. I cant get the HDD Leds and Power LEDS to work. I went by the manual but it doesnt work. I tried the HDD led like it says in the manual but the light just stays on all the time and the power led doesnt turn on

 

[Gretzky]

ya finally i got the leds right . Once again i tried taking out the jbat jumper out for a few mins even and putting it back in and rasing the vcore but it still froze. I tried putting the settings back to default but it froze again. But i guess its fried then, wiered cause the day this happened ( month ago ) i didnt smell anything burning or any sparks nothing. The mobo looks fine, no brown places nothing ( just like new ). Shiz happens i guess.

 

[Shagger]

Gretzky - Did you short the JBAT pins together with the jumper or did you just pull the jumper off the pins it was on? You have to attach the jumper to the pins AND have power OFF to the mobo. Turn off the Power supply to the case and jumper the JBAT to reset the CMOS to defaults.

If you tried that and it didn't work then you may have a fried board.

Trying a different board doesn't mean anything since that board's CMOS settings were probably all right before you started.

 

[Shagger]

What the jbat jumper actually does, or used to do, is shorts the battery connection. Im not sure it still does that, but on the older boards it did. Move it to the other position for a few seconds then back, but if your using a K7T266apro it should be in the bottom 2. Not sure about the other k7t mbs though.

Follow Jwyatt's advice you have to move it to the other pins and leave it there for 5 seconds that should do it...

 

[Gretzky]

ok i this is what i did.

1: took the jbat jumper off completely for 5 mins
2: put it back on at the first 2 pins for about 1 min
3: put it back at the last 2 pins
4: reboot, waited, computer froze.

Fried mobo maybe dunno. I wont through it away just yet.

 

[Drsignguy]

After you reset the jumpers, can you get into bios to adjust it or does it freeze before? If you can get into it, Maybe you need to adjust some settings from the default settings. If you cant get into the bios to do this, you maybe have a messed up mobo.

 

[Regalk]

SInce no one else mentioned it properly/clearly:
Always clear jumper with PS OFF and PS cord pulled out. Wait a minute then clear the cmos.
ALso try taking off the CPU check it (clean it if necessary) and reinstall fan
Try reseating SDRAM
If you have a modem/NIC card - take those out for the moment.

 

[Don66]

<< 2: put it back on at the first 2 pins for about 1 min >>




<< 3: put it back at the last 2 pins >>



Did you try to short pin 1 and 2?
And try to place it on 2 and 3?

If you did 1 and 2 hold the cmos 2 and 3 clear it.

Look on page 2-27 in your manual

 

[Gretzky]

yes i can get into bios but for a very brief moment until it freezes. Also what do you mean by short pin 1 and 2?

If i put the jumper on pins 1 and 2 the computer wont turn on, only when the jumper is on pins 2 and 3.

 

[Don66]

Maybe you need to RMA the board?

Acording to the manual it has to be set on 1 and 2 to keep data. 2 and 3 to clear the CMOS

From the manual "You can clear CMOS by shortin pin 2-3 while the system is off. Then return to 1-2 position.."
"Avoid clearing the CMOS while the system is on; it will damage the mainboard"

How can it hold the data when you have it in the clear position??

 

[Gretzky]

ya i know very wiered. I tried turning the comp on with the jumper on pins 1 and 2 but it wouldnt turn on, i put the jumper back on at 2 and 3 and it turns on.

Also wouldnt this issue void my warrenty? ( overclocking ) and i have this board for 1 and a half year now so dunno if i have a warrenty still on this product.

 

[Jwyatt]

Gretzky, Your problem seems suspicious. Usually OCing doesnt harm the MB. IF anything its the CPU or the pci cards taht goes. I would suspect the MB is still good if you can post and get into bios.


Regalk is right. Make sure to have the power off of the supply when you jump the jbat. I forgot to mention that. OOPS

If you dont wanna fool with it anymore just chunk it in the mail and send it to KING NC for me to tinker with. Gotta build my granny a comp anyways. If it freezes she wont know the difference :Q

 

[Gretzky]

lol thats mean. but thanks for help