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Himem detected unreliable XMS memory?!

Posted on 1998-10-03
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Last Modified: 2010-05-18
I have a laptop (CTX-Ezebook, p200 mmx) with latest Windows 95 OSR (latest). I had 24 megs of ram whereof 2 ramcards with 8 each (EDO, DIMM). I bought two new ramcards a 16 meg each. I successfully managed to start the computer afterwards I put them in and while the bios info scrolls by it reports 40 meg (16+16  +8 on the motherboard). After  I started the computer I did one thing in windows. I used some utility that optimizes the cache size that windows uses made it optimize it for 40 meg. Today when I start the computer. I first get the message: "While initializing device VXDLR: Windows protection error. You need to restart you computer."
Then I restart and I choose safe-mode. Then I get: "Error Himem.sys has detected unreliable XMS memory at address 0080004. XMS drive not installed"
So is it the new memory? Or my fumbling with cache size in windows. I dont have a clue! Is there some dos utility I could download and diagnose this better with? I tried memmaker in lack of better but it only hanged the computer without any error messages at all when restarting....
many thanks in advance
Kaj
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Question by:nekm
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MATTCEI earned 600 total points
ID: 1126119
This is pretty cut-and-dried: bad (or incompatible) RAM.You don't realley need a diagnostic - Himem is doing that for you.Put the old RAM back in - things should return to normal.Then try the new RAM again,paying close attention to the mounting pins.You can also try changing any memory related settings in BIOS (especially 'LOWRC' if you have that - change from 'none' to 'both'),but I'm afraid it looks like that new RAM has got to go.
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by:nekm
ID: 1126120
Ok, thanks! I've twisted them around a bit and right now they seem ok, giving full 40 megs without problems. But it worked allright with the old memory as you said. So I have a backup should it go sour on me again.

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by:MATTCEI
ID: 1126121
Sounds like it was the contacts.If it happens again,look closely for a bent pin.
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Author Comment

by:nekm
ID: 1126122
Thanks, again, what happened was that when I took it home from work late last night it stopped working again. After some experimenting I found that it worked properly at home without the metalplate that works as both heatconductor and as a "floor" for the keyboard! However gentle preassure I screwed it tight with. I ended up with some problem. Could be a "cold soldering" (I don't know the term in English) or a pin as you said. But I had a look at the pins, they seemed allright allthough they are hard to make out. Seems like I have to hand it for service? Ouch!
best regards
Kaj

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by:MATTCEI
ID: 1126123
Not yet - still might be it just doesn't like the new memory sometimes.Why not put the old memory back and run it for a few days.If you never have a problem,return the new memory.

The metal plate thing might be a new,unrelated problem.Once again,does it happen with the old memory? If so,look for anything that it could be shorting to.
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by:nekm
ID: 1126124
Ok, I'll try it out, thanks again
Kaj

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