So was bored this weekend and decided to rebuild a solenoid driver board (SDB) I had lying around along with a spare MPU board with working Fathom roms (I tested it in my Fathom and it worked). MPU rebuild went great and tested good with a known, good working SDB. On to rebuild the spare SDB now. So, long story short, in my haste and while distracted on the phone with my brother, I installed the 5v regulator in backwards. Didn't realize this until I turned her on and *pop*, blew R50 on the SDB. Had my nicely rebuilt MPU in there too. Awesome. Stupid mistake.
So this is where I'm at with the MPU using a known good SDB (will have to figure out what I damaged on the rebuilt one later): LED locked on. Getting 5v at the two test points on the MPU. Pin 40 on U9 goes high as it should. Shorting pin 39/40 on U9 (or jumping r1/r3 junction to TP4) as suggested in the guides does NOT cause the LED to flicker or start flashing (LED still locked on). I also checked the voltages on the legs of a couple of other chips suggested in the guide and they seemed a little high (like 3.3 instead of the 2.5 like it should be). I swapped out what I am pretty sure are good U9 and U11's and LED still locked on.
Could I have fried something in the reset? I'm guessing with the voltage regulator in backwards I dumped some current into the MPU and blew at least a couple things up. Any suggestions? Again, I'm not horribly worried since these are spare boards, but it would be nice to have a spare set to fall back on just in case (without dropping $300+ on Alltek boards). Not to mention, a good learning experience (like don't install the regulator backwards a__hole!). Thanks.