S115 CPU Reset

Having replaced a S115 943B CPU with a new (s/ex) one, I get a flickering STOP led on power up. When checking the interrupt stack, I've got "Error Detected During CPU Self Test".
Have I been sold a dud, or could there be a simple explanation???

Thanks,

Paul

Use the erase function in step5. If you still have the same problem the cpu is prob busted :/

Carry out an Overall reset, as ojz0r states if still the same then the cpu has a fault!

yeah overall reset is the word i was looking for hehe im at home now so dont have step5 infront of me

If I remember correctly you can perform overall reset by setting CPU in stop, then hold reset switch in OR position and while holding it, quickly perform STOP-RUN-STOP.
If OR is successfully performed, STOP LED starts flashing quickly. Now when placing CPU in RUN, it will load software from EPROM (memory) card.

Good luck,
Pandiani