Rehabbing a tortured pismo

[torus_aei]

Howdy everyone, longtime listener; first time caller.

Curious to see if anyone has run across a similar issue before in the wild. Just got this pismo 400, and it seems somebody either overtightened or used the wrong screws after a past teardown. The machine powers up but shuts off when moved or picked up. I didn't notice this at first and suspected a faulty power cable connection, but after discovering the protruding screws I think it's safe to assume that it's shorting out somewhere inside. I'm not sure how I'm going to fix this, but I am playing with the idea of also replacing the outer lid and bottom case as a restoration project and maybe even make a video or writeup about the process for marchintosh.

 

[Byrd]

Yeah that's not factory . Take it apart and see, someone has done it and it probably worked like this for years, it might be a faulty DC jack that makes it switch off when moved, over this butchery.

 

[AlpineRaven]

I'd open up and see whats going on..

I have noticed poor connection on DC_DC board causing sudden power off - so you would need to open up anyway
Cheers

 

[CC_333]

I'd open up and see whats going on..

I have noticed poor connection on DC_DC board causing sudden power off - so you would need to open up anyway
Cheers

Agreed.

Another symptom of a faulty DC board connection is a lack of sound (both the internal speaker header and headphone out/line/mic in jacks are on that board).

c

 

[torus_aei]

Thanks for all the input! After closer inspection, I think you guys are on to something here. It's looking less like it's shorting out due to the screws protruding through the case and more likely that it's just a weak connection/the DC board needs re-seated. I've just taken delivery of some thermal paste and an IDE -> mSATA converter + 128gb SSD. I'm in process of doing a full teardown + ssd installation video for #MARCHintosh. Stay tuned!

 

[MacUp72]

I‘d disassemble the pismo and inspect the board for any physical damage