5 ms·
I have a story like that! Back in my lab rat days, I dropped a scope probe and its grounded sleeve skittered down the back side of a powered-up, prototype memo
by MarkusWandel 1y ago
I have a story like that! Back in my lab rat days, I dropped a scope probe and its grounded sleeve skittered down the back side of a powered-up, prototype memory board (with 240 individual RAMs on it), leaving a trail of sparks. After that it was dead.
Uh oh. We needed that board. What to do? Well, it can't hurt to try. We had "freeze spray" for debugging purposes, so got a bottle of white-out handy (what's that?), frosted up the board really well on the component side, powered up, and quickly marked the devices that defrosted notably quicker than the rest.
Got the solder station lady to replace all those parts and it worked again.
Old days...
- minipci1321 1y agoThese days they do that using a vape, cover the PCB with a thick layer of vapor and see where it raises the fast after power-up. Youtube has videos.
- tverbeure 1y agoUsing your comment as a crutch to post a link to my Eye of Sauron function generator story: https://tomverbeure.github.io/2023/01/02/HP33120A-Repair-Shutting-Down-the-Eye-of-Sauron.html https://tomverbeure.github.io/2023/01/02/HP33120A-Repair-Shu.... That was an incredibly satisfying repair if you ignore days of dealing with after effects of burnt PCB material in your lungs.