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awergh
March 15th, 2014, 02:48 PM
I got an IBM XT today yay :)

but I don't know how to open the case :(, seems so sad I thought it should be obvious but after undoing the case screws I can't seem to get the outer shell of. It is a little bit battered which I think makes it a little bit harder than it would normally be anyway to.

Also unfortunately for me its a 110V PSU so no powering it up here with out a stepdown converter thingo either.

No monitor but it did come with an IBM Model F keyboard although missing the 0 key from the numpad. In general it looks a little bit battered and dirty but apparently it was working when it was imported from the US, I'm not quite sure how long ago that was though.

commodorejohn
March 15th, 2014, 02:54 PM
Nice :) Are you sliding the case forward? It has to come off that way, since the front bezel is part of the top case.

lutiana
March 15th, 2014, 03:15 PM
On the back of the case there are 5 screws. They are bottom left, bottom righ, top left, top right and in the very middle. Once these are all removed the top case slides forward, then lifts up. Do this carefully, as it may catch on cables when sliding.

SpidersWeb
March 15th, 2014, 04:53 PM
Once you've got the case off, I'd recommend following (step by step) modem7's guide starting from here: http://www.minuszerodegrees.net/5150_5160/MDC/minimum_diag_config.htm

If the machine does, quite literally, do nothing when power is applied - then the most common cause is a short on the motherboard somewhere.
Yesterday I discovered a 3 pin capacitor had shorted on a serial card - causing my 5160 to do this (fixed now).

awergh
March 15th, 2014, 06:51 PM
Ah I see now, I think it was just getting caught. I didn't realise that the front would come off as well.

It looks like I'm going to have to do some cleaning.

Unfortunately the serial card had a leaking battery on it and has leaked green stuff into a couple of the ISA slots. I've tried cleaning green stuff before with vinegar but I've never been super successful so I'm not sure on the correct procedure for dealing with that.

Also seems the CGA card is stuck at the moment because I cant turn the screw at all. I seem to just be destroying the screw and not turning it. Case is a bit bent out of shape at the back to.

In general lots of work but I have to get everything out of the case first before I can do anything.

modem7
March 15th, 2014, 10:18 PM
but I don't know how to open the case :(
For an illustrated procedure, see page 17 (PDF page 19) of the document that is [here (http://www.minuszerodegrees.net/manuals/Tecmar%20-%20Guide%20to%20Cover%20removal%20and%20Replacemen t%20-%201985.pdf)].


I thought it should be obvious but after undoing the case screws I can't seem to get the outer shell of. It is a little bit battered which I think makes it a little bit harder than it would normally be anyway to.Usually, there is some initial resistance that needs to be overcome.

awergh
March 15th, 2014, 10:57 PM
Well I have all the cards out and the motherboard so I guess I should probably clean the ISA slots first and then the case itself and go from there.

It occours to me I haven't been totally clear what the battery is.

Quadram Quadboard with a blue Varta 2/100 DK0 battery.

I think its either NiCd or NiMH from what I can google but not sure. I do know its not the black self contained looking thing on later versions of this card.

awergh
March 19th, 2014, 10:55 PM
So I've cleaned it up but no it won't post so following the guide posted earlier I now need to replace 1 or 2 capacitors.
http://www.minuszerodegrees.net/5150_5160/MDC/no_beeps_1_1.htm

It appears I don't have any 3 legged tantalum caps and only 2 legs so I assume I can just drop it on as was previously with the old one.

Am I right in assuming that this is the correct replacement? http://www.jaycar.com.au/productView.asp?ID=RZ6648

modem7
March 24th, 2014, 02:13 AM
It occours to me I haven't been totally clear what the battery is.
Quadram Quadboard with a blue Varta 2/100 DK0 battery.
I think its either NiCd or NiMH from what I can google but not sure.
Given the vintage of Quadram Quadboard cards, the original battery will be NiCd, but in this application, NiMH is a suitable replacement.

modem7
March 24th, 2014, 02:17 AM
It appears I don't have any 3 legged tantalum caps and only 2 legs so I assume I can just drop it on as was previously with the old one.
Follow the 'Option 2 of 2: Replacing 3-legged with 2-legged' section of http://www.minuszerodegrees.net/failure/failure%20-%203lt.htm


Am I right in assuming that this is the correct replacement? http://www.jaycar.com.au/productView.asp?ID=RZ6648
Yes, a suitable 2-legged replacement.