Helping a neighbor out and his car wouldn't start.
Gots spark but no fuel
Noticed CEL is solid so I suspected a dead ecu
Got another working p06 ecu and worked for 3 days and ecu somehow is dead again.
Solid CEL again!
So I put my ecu p75 obd1 and started right up. No solid cel
Anyone have any ideas what it is? Tried main relay

 

what kind of car, what engine setup?

 

Sorry forgot to indicate bone stock 93 civic 4 door with just intake

 

Did you ever pulled the code on the CEL? Just because the car doesn't crank/start, you can't assume the ECU is dead.

 

For sure it's dead.
Tried checking ecu codes still solid
Tried another po6 ecu starts up fine and runs good so far
Tried using the 2 of the old Ecus that blew solid ecu still

 

You should consider finding a friend who is very good with circuit boards to open up your ECU and see if there's something consistently wrong with both of the fried ones. You might have a wiring problem in your car that is blowing ECUs.