Massive Motherboard Problem

[Tsunotech]

hello, first time here so please excise any errors on my part. so i have a printrbot plus model, and everything was working fine until about a month ago the main power connection on the motherboard started shorting and melted to the casing. this caused random emergency shutdowns among other obvious short problems. anyway i re-installed a new cable and plug but while testing it out i momentarily inverted the power(13-13.5v) and now when powering up it will not be recognized by the computer. i fear i may have destroyed some of the motherboards hardware. any help would be appreciated thank you.

[Tdeagan]

Ouch! There aren't a lot of things to check. You've tried a different USB cable, so next try a different USB port on the computer. Lastly try a different computer. If you can't get any love from either of these, you may be looking at a fried board.

On the outside chance you've got a AVR programmer of some sort you could attempt to talk to the board through the ICSP port, but that's only going to tell you if the chip is responding.

Good luck!

[Tsunotech]

yeah i tried all of that, was wondering though could the chips/capacitors be replaced ??, i mean a new board is like $125.00

[mdfast1]

Yes all the parts can be replaced, but is it worth it for you to diagnose and find which component is bad is your call. The printrboard BOM and schematics are here to help with troubleshooting + part ordering: https://github.com/Printrbot/printrboard