boxst

Hello

As I was suffering random reboots, I decided that I should upgrade my power supply to 400W. So I dutifully bought a new one and installed it.

Now, nothing boots! If I boot in safe mode it gets to c:\...\mup.sys and then hangs. If I put the old power supply back the same thing happens.

I have: Removed all the PCI cards, swapped the graphics card, reseated and tested the memory, removed all hard drives, tried to boot from my Windows CD and "R"epair (hangs), re-install windows on another hard drive (hangs while trying to load from CD).

Help!!

Thanks,

Steve

jpor

iTrader: (1)

Could be you have knackered RAM which is corrupting things. Have you tried removing said RAM and using another stick?

boxst

Hello

I have tried another ram stick, and it still hangs on mup.sys.

Frustrating!

Thanks,

Steve

jpor

iTrader: (1)

Okay it appears that mup.sys is corrupted. I have you tried the repair console to copy over a good version of mup.sys?

When did you replace the RAM, before or after the XP re-install?

boxst

Hello

Okay, I think my motherboard is broken (annoying as it's only 6 months old, but bought in America so no guarantee). If I disable the L2 cache from the bios settings, then everything boots okay (albeit incredibly slowly).

Any other suggestions?

Thanks,

Steve

jpor

iTrader: (1)

Ummmm.... Have you tried a BIOS reset? Just in-case you have something set-up wrong. Either that have you tried flashing the BIOS to a newer version?
The L2 cache is normally found on the CPU.

boxst

Hello

I have reset and then re-flashed my bios. And it's definately the "L2 Cache" setting. If I enable it, the nothing works. Disable it, everything is good.

So, the question now (based on your response above) is that the motherboard or the processor at fault?

Thanks for your help.

Steve

bioforger

iTrader: (1)

CPU by the sounds of it. Maybe u knocked it, or u didnt take anti-static precautions when installing the new PSU ?

boxst

Noooooooooooooo ... really?

Sigh. Anyway I can test that?

Thanks,

Steve

MJW

The L2 cache is on the CPU so it sounds like the CPU may be damaged. If you have another compatible motherboard, try it in that.

jpor

iTrader: (1)

I second that. Although it is not uncommon for the motherboard not to be communicating witht he CPU properly. Although I do remember having an AMD 686 processor that did the same and when I replaced it, it worked fine.

The only way to find out I'm afraid is to try what MJW suggests.

As an after thought. Your CPU settingts in the BIOS correspond with the type of CPU you have? In other words when you boot up it displays the correct CPU credentials?

boxst

Hello

I am going to have to try to source a motherboard then I guess. The motherboard CPU jumpers are correct, I tried playing with those as well.

Steve

russell hayward

try a new ide cable, had the same problem with the mup.sys hang, new ide cable fixed it.