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| PowerBook 270c |
Posted by: digitalrampage on 2018-01-21 04:11:40
Hi Everyone,
My Powerbook 270c wasn't working and ticking, so I cracked it open and saw that the caps were leaking. Removed all the SMD caps, cleaned and replaced with Tantalum.
There was no change. So I washed the whole board and the unit still is not powering up with this buzzing from the cap area.
Any suggestions on possible other causes?
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Posted by: techknight on 2018-01-21 06:44:40
there may be shorted semiconductors in that area. you will need to do some electronics troubleshooting to figure it out.
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Posted by: digitalrampage on 2018-01-22 17:51:14
there may be shorted semiconductors in that area. you will need to do some electronics troubleshooting to figure it out. I don't want to sound like a dullard/luddite, but what kind of troubleshooting can you recommend. Visually everything checks out, do I start looking for shorts to ground?
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Posted by: techknight on 2018-01-23 02:26:51
you could start there. Too bad you dont have a 2nd board that works as a reference. Thats what I tend to do with machines that I have no schematics for.
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