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Home Forums 68kMLA TAM — #89
Post #89 by falen5
Source Forum68kMLA
CategoryHardware
Post DateSun, 24 May 2015 - 19:52
Original URLhttps://68kmla.org/bb/threads/tam.1948/
Post
still not there with this tam

Did a recap of the motherboard and it is still the same - bad display, no sound, no control from front panel and harddrive wont spin up

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ive checked all the caps to make sure they are all right but the tam is exactly the same as it was before the recap

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to be honest I don't think it needed the recap yet - but sure anyway its done

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have gone over the machine time and time again but I am at a loss as to the problem

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I am trying to power it on with just 1 ram simm, no cache and no rom simm

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going over the motherboard with a magnifying glass I discovered that C113 is missing. It was located directly under the battery and looks like it was an acid victim

I have no way of knowing what its value was or how important it was.

You can still see green on the traces under where the battery was

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however when I turn it on even though the display is all messed up, after 10 seconds I get the flashing disc icon....that means that much of the board must be good. It boots from a floppy but stops during boot and gives an error - probally wrong system on the floppy - I can use the mouse, even though the screen is all messed up,  to eject the floppy

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is there and schematics of the tam? - how would I get the value of c113?

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dam acid leaks!!!! - starting to wonder if it is indeed too late for this board. Also it stops powering up after 5 or 6 powerups. You have to disconnect it for 20 min before it will start again

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man this thing has truly wrecked my head. Tam = lovely machine to look at but a devil to work on. Just opening that powersupply took a whole day

c113.JPG

IMG_6440.JPG

IMG_6441.JPG

IMG_6442.JPG

IMG_6444.JPG

mp.ls