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Apologies I did not see the photos the first time around Looks like you have power - can you look at the LEDs at the other end of the board - near the filterboard and on the same side as the comms board bank of LEDs that you have a pic of They should be flashing and if they are step 2 - they...

No sadly not - well I say that, I have never actually tried to do that but I am pretty sure the mapping is different due to the changes that were made - give it a go but pretty sure it will not work

Deflection Yoke - they all have individual nos also - some tubes may have different DY's fitted to them - hence it is always best to check Hope that clears it up J

Model 3 Info Step 1 had some errors on the planet chip designs - hence it was barely used and quickly replaced with the Step 1.5 system Step 2 was an increase in horsepower which allowed the newer games to run smoothly Step 2.1 incorporated some slight changes to 2.0 but compatible fully

Check your PSU for +3.3V, +5V - +12V not critical for boot - that's the first place to start Then go onto looking for any LED activation on power up - there is a bank of around 8 I think - check them Sounds like the boards are not booting up - poss dead CPU boards - they can be replaced with...

CRT Model No. for CH-666A-29 Dy No. LH (mH) LV (mH) Toshiba curved SF A68KJU96X01 05F18624A1/TY-29KF4L 0.38 14.5 Toshiba curved SF A68KJU96X 5F18389A1/YS-59802 0.44 18.4 Toshiba curved A68KTB189X89351322 TY-5292A 0.316...

CRT Model No. Dy No. LH (mH) LV (mH) RH(ohm) RV(ohm) Toshiba curved SF 25" A59JMZ90XD3 YS-57696A 0.542 19.75 0.8 9.5 Toshiba curved SF A63JHF81X(MS8-26SC) 05F18173A2 0.53 8.19 0.7 39.4 Toshiba curved SF...

It is possible to swap 27" (USA) or 29" (World) tubes about (they are in reality 68cms as per the code on the back of the tube A68xxxx etc) The trick comes with convergence set up with differences in the geometry of the tubes themselves As pointed out above the MS9 tubes are curved (although...