Buying a BCR will not resolve this. Also you need to be very specific on sounds and such heard when applying power. Use a brand new alkaline for test to ensure good battery if you do not have shutdown sounds to play to know current battery is good.
When voltage first applied at 10-12V range, you will get your two dings and engine will transition into idle sounds. It is NOW IN THE RESET STAGE. Voltage needs to be less then 10V when using direction button to get it into FWD. Otherwise engine stays in reset and believes you want to program. Will not move.
If voltage less than 10v and you hit direction button and it does not move but rather repeats the 2 ding start up, the memory chip on the top board got scrambles. Only dealers have the Various fix chips. The Make PS is ONLY FOR ONE SYMPTOM. The three clanks which means the engine has a software conflict.
Being a PR or RK DOES NOT Matter same PS-1 board and same troubleshooting technique.
Lastly, if you try to get to Reset Stage 18. Power up to 16V let engine start up. The lower voltage and raise per manual to move to reset stage 1. You get one ding, if you do it again, but can not hear 2 dings. Your stuck in reset position 1 with an engine ID conflict. Again a special chip with a procedure I wrote up on this forum years ago. It had to do with old QSI coding that would allow engines to have ID assigned otherwise they would not operate on the layout until you triggered it. The problem was MTH Software did not want to use it, but if the ID Memory got set wrong in a shutdown, you did not have the capability to overwrite it without an QSI chip that had the software to do it. Hence engine would not work because if thinks you want it not to operate. MTH solution was a new chip with correct software to over write it and skip ever looking at that memory state.
As far as some other folks issues especially with motion if the engine otherwise trys to operate, inspect the bottom board carefully. Motor diodes get hot and they can desolder themselves and traces do burn up. Usually visible. Other issues can come from component failures with these boards that are now 25 years or older. G
