Thread
HELP WITH MACINTOSH PERFORMA 200 BOOT UP
Look at what's on the memory chips and try digikey or mouser online.
The Perfoma 200 is a Classic II; which has 4megs on the mother board. The RAM on the SIMM slots is supposed to take it to 10megs at most (2 more 4Megs will take it to 12Megs which 2megs it is blind too).just tell me what can I do with the SIMMS chips.. what can i replace them to ? I have a real feeling, it is them SIMMS chips whats causing the issue.
Question here is, does the Performa turn on and boots or gives a "?" inside a disk icon or does it still gives stripes? Getting the icon then it might be the SIMM RAM or something with the SIMM Socket. If it still gives stripes.... well, there is more to look for.
See the link attached.. These are the ROM/SIMMS CHIPS i am talking about which i am sure are the problem..
http://www.downtowndougbrown.com/wp-content/uploads/2011/08/OriginalROMs.jpg
http://www.downtowndougbrown.com/wp-content/uploads/2011/08/OriginalROMs.jpg
See the link attached.. These are the ROM/SIMMS CHIPS i am talking about which i am sure are the problem..
http://www.downtowndougbrown.com/wp-content/uploads/2011/08/OriginalROMs.jpg
I think those are Apple specific, since they have a 341- XXXX part number. You could get those from another board. You can try searching on 341-0733, 341-0734, 341-0735, 341-0736.
RICKROB - Do you think these chips are the ones playing about ? Which is why the black and white stripes are showing on the screen
It sucks they are soldered directly to the LB. In my 1st gen Classic II they are all socketed. Much easier to replace. You should be able to gut any Classic II and steal the ROMs from it to fix your problem if it is indeed the ROMs, since the Classic II and Performa 200 are identical (I'm fairly certain it comes up as a Classic II on the System 7 versions that identify the particular machine in "About This Mac")
Just make sure to check all the ROM traces on the LB before you go replacing the ROMs. If its actually a rotted trace and not the ROMs then replacing the ROMs will give you the same error as the trace will still be rotted.
Just make sure to check all the ROM traces on the LB before you go replacing the ROMs. If its actually a rotted trace and not the ROMs then replacing the ROMs will give you the same error as the trace will still be rotted.
Yh these 2 are socketed aswell
You could send me the board and I can at least swap the roms in from my P200 and tell you if it is in fact the roms... Someone with the right equipment could clone them conceivably... Also: I would suggest giving your newly soldered capacitors a gentle tug each way to ensure they are properly bonded...
Performas come with their System 7 that says Performa on "About this Mac." The issues here is the system end in a "P" like System 7.0.1P in the Performa 400. But if the system crashes and you reinstall a system from a Generic CD or Floppies, the "About this Mac" come up with the Non-Performa machine version; that Performa 400 I stated before becomes an LC II.(I'm fairly certain it comes up as a Classic II on the System 7 versions that identify the particular machine in "About This Mac")
For the Perfoma 200, is you replace the Performa System version with a regular System Version, it becomes a Classic II on "About this Mac." Except for the label, they are the same machine.
Those are not SIMMs, those are the actual chips; called DIPs for Dual Inline Package. A SIMM is a Single Inline Memory Module, and goes onto a clip-socket on the mother board.See the link attached.. These are the ROM/SIMMS CHIPS i am talking about which i am sure are the problem..
http://www.downtowndougbrown.com/wp-content/uploads/2011/08/OriginalROMs.jpg
The problems is not (usually) the ROMs but the circuits that access them. Its more than likely that it's a bad or broken trace on it. You can check the connection of the ROMs themselves with a multi-meter. All but 10 - 12 pins on each ROM should be connected to the others. These 10 are 8 data lines and 2 - 4 Read/Write and Chip Select lines. These 10 - 12 lines you need to check to the connected VIA or the CPU. The ROM Address Lines should also connect to a VIA.
Edit Add: I have the same freaking issue with a SE/30 and I know that the issue is with rotted traces to a couple 74LS series chips on the board (the 74LS chips are replaced by the VIA on your board). I just have to sit down and actually trace the lines and replace the broken traces with thin wires. Just been too busy to get it done.
I don't know if this helps or not, probably not but this video
does show an SE30 with very similar symptoms. If the logic board on the performa 200 is similiar to the SE30 in particular the video chips perhaps this video can help.
The Performa 200 is a Classic II. That is a BIG difference between a SE30 and a Classic II. The Classic II's board is 1/2 the size of the SE30 board; from the ports of the SE/30 to the first set of SIMMs and with a lot fewer chips. It is more like an LC II than a SE/30.
Because of this, the problems might be similar, its cure won't be. Where all those tiny chips on the SE30 board, there is only 1 chip on the Classic II board that replaces them all. So chances are that chip is either dead (highly doubtful) or you got rotten and broken traces around the chip.
Because of this, the problems might be similar, its cure won't be. Where all those tiny chips on the SE30 board, there is only 1 chip on the Classic II board that replaces them all. So chances are that chip is either dead (highly doubtful) or you got rotten and broken traces around the chip.