HELP WITH MACINTOSH PERFORMA 200 BOOT UP

[360alaska]

Do 2 hours at 200F... And really, the best thing to do would have been to removed the old caps, put it in the dishwasher, rinse it with distilled water, put it in the over for 2 hours at 200f on a piece of cardboard and then solder on new caps...

 

[360alaska]

I disagree with 10 minutes at 400F, sounds like it might heat shock the board and cause other issues

 

[ROLLERMANZ]

Guys to be honest, i am sure its not even wet.. I have washed 8 boards before and always dried them up like this and they always worked.. Im sure its not that case.. I want to know what can i do with the SIMMS CHIPS? How can i replace them and what can i replace them to ?

 

[Macdrone]

I do the 400 for 10 to do a safe basic reflow of unseen cracks in solder.

 

[ROLLERMANZ]

Just tell my the timing of the baking and i will jus follow the time then

 

[Elfen]

40/60 solder melts at 368°F (186°C). Putting it into a 400°F oven will reflow the solder but it can also loosen other parts as the solder begins to flow. Timing would be tight on this if it is done: too much and parts begin to get loose, shift about and fall off; too little and nothing happens. You can also fry your chips at this temp if left too long.

200°F sounds better, but its not hot enough to reflow the solder. It will chase out any and all moisture from the board. And at long exposure it wont cook the chips.

 

[360alaska]

In order to do that correctly you would need to bring the board temperature up slowly to minimize heat shock, and you might also have to apply flux on a massive scale... Furthermore, when these boards are wave soldered at the factory the smt components are glued down so hopefully that glue still holds...

 

[Elfen]

The glue holding things down depends on how old it is and how much is used. I noticed in recapping some Powerbook Duos, the the least likely that glue is doing it's job on small pieces though it will be on larger pieces on older Duos (210 - 230, and at least 1 250 I've seen). On the newer PowerBook Duos (270s, 280s, 2300s) , that glue is still holding on all the pieces. This glue is red in color what what I seen.

 

[ROLLERMANZ]

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. 

 

[Macdrone]

Get extra 30 pin Simms and solder on new chips.

The 30 pin sims in the slots you just pull out like normal memory.

But again have yet to see bad on board memory on these.

 

[ROLLERMANZ]

What do i type in ebay to get these SIMMS chips for this

 

[Macdrone]

Look at what's on the memory chips and try digikey or mouser online.

 

[Elfen]

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. 

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).

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.

 

[ROLLERMANZ]

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

 

[rickrob]

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.

 

[ROLLERMANZ]

RICKROB - Do you think these chips are the ones playing about ? Which is why the black and white stripes are showing on the screen

 

[Paralel]

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.

 

[ROLLERMANZ]

Yh these 2 are socketed aswell

 

[360alaska]

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... 

 

[Elfen]

(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")

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.

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.