Can anyone Solve this? K6-2/Board problem

[BarnyardMonkey]

Had a system together for my 11 year old niece,and out of no where it would't post no more.
K6-2 400 CPU was installed.

Ok so i tried an older P133 CPU i had laying around to see if it was the CPU.
the P133 booted fine.

so went ahead and bought a K6-2 450 and now its doing the same thing that the 400 was doing.
tried changing PSU's but not sure if either are AMD approved.
they are just a couple Generic 250W.

but was wanting to know if a PS isn't AMD Approved,will it not let a system post at all?

i noticed when i had the 400 in it working fine,it would get the random reboots every now and then.

but as i said,the P133 works fine but the K6-2 400 and 450 does not.
just want to make sure that its not the CPU that i just got thats bad.

Also,with the first PS,when i power on with the AMD CPU in it,the PS fan will start to turn on,but then just quit.
it will work fine with the P133.


Just tried a newer PSU with no luck.did the same thing.that makes 3 PSU's now,and which one of them ran the system fine for 2 months.


Specs:

ATX Biostar M5ALA Board
K6-2 400 and 450
48X IDE Cdrom
IDE HD
PCI 8Mb Vid
ISA Sound
ISA 3COM NIC


Thanks for any help.



Shawn.

 

[Adam12176]

The AMD chips are definitely comsuming more power than the P133 (That's a given) My guess is that the generic 250's just weren't strong enough (Borrow someone else's bigger PS, and try it) Are there a lot of peripherals connected to the system? A lot of add-in cards? Maybe everything else in the system is sucking up so much juice that the processor just ends up losing the power struggle. Also, are you sure the board supports the K6-2's, and at the right voltage? Any bios updates available?

 

[BarnyardMonkey]

Yeah the board supports the K6-2's.
the website showed it supported them,and the board goes up to a 4.5 Multi,and 100FSB.

it was working fine with the k6-2 400,then out of the blue it quit working.
and now it won't post,nor will the 450.


don't seem to be the wattage of the PS,since its 250W.
and only have a Cdrom,1 HD,sound,Vid,NIC and FDD.

no extra's.

was thinking they just won't un an AMD CPU properly.



Shawn.

 

[BarnyardMonkey]

Ok i'm thnking that its not the PSU now.

anything else it may be?


^^^

 

[Demon-Xanth]

A problem with the motherboard's voltage regulation section.

 

[BadThad]

What do you have the cpu core voltage set at? Also, the K6 uses a dual voltage whereas the P133 is single. There should be settings to toggle this with jumpers. If you pop in the P133 and it posts, then change jumper settings and put in a K6, it should post. If it doesn't, then you most likely have a cpu voltage problem. Try increasing the voltage a bit, like 2.3V core. (as I recall, the K6-2 is 2.2v)

 

[Olias]

<a target=new href="http://www.amd.com/products/cpg/k623d/win95_update_k6.html">AMD-K6®-2/350 and Above Patch
</a>

 

[BarnyardMonkey]

badthad, the CPU coore and IO is 2.4-3.3 on the 450.
and its setup for the 450 (so i thought).

dound out that theres a V2.0 out of this board.the board i have is V1.0.
if anyone can find jumpers for the V1.0 board i would appreciate it.
i've been using the V2.0 jumper settings.

Olias, that patch won't help in my situation,i can't get the system to post at all.
thanks for replying though.


Shawn.

 

[Zepper]

. Check the core voltage again. Some K6-2s have different core voltage requirements even on same speed level chips. The only way to be sure is to check what's printed on top of the CPU (or fan label it it's a retail CPU/HSF combo). If the requirement is 2.4 you will need to set at 2.7 as I don't see a 2.4 option for your board (2.7 is safe for 2.4 rated, a little high for 2.2 rated).
. Also make sure NOTHING is connected to the GREEN SWITCH contacts on your front panel header (where LEDs, Power, Reset switches, etc. are connected).
. If this doesn't help, then I suggest cleaning the contacts on your RAM and video card--OBSERVE STATIC PREVENTION PROCEDURES. Check other cards for signs of corrosion and clean them too--heck clean em all as long as they're in your hand--use a good contact cleaner/enhancer such as Caig Labs Pro Gold. Be sure to put them all back in the same slots. . Make sure all socketed chips on mobo are seated well--I lift and reseat socketed chips occasionally just because... To be AR about it, you could use Pro Gold on their contacts too. If that doesn't work, I would guess you have a dead mobo there.
.bh.
ps. Make sure main power connectors are seated well also. Use Pro Gold there too.bh.

 

[Colt45]

make sure your core voltage is right. after that, make absoloutley sure you have enabled dual voltage (as your last cpu, the 133, uses single voltage)