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Here is a photo, sorry it is not the best but i have not long moved house and currently building a new garage / workshop so everything that should be in there is crammed into the house ( even a petrol suffolk punch lawnmower under the stairs) 🤣

If this turns out to be the Chr chip, very unlikely but possible, I can probably do a patched rom (that doesn't need Chr chip).

Deaf, not death.

Ah OK, that won't work. You need to try and fully working ROM cart, complete with the correct CHR chip, in the machine and see if it boots up. I can send you one if you want to give it a try and see what happens?

Been numerous times, everything in there is bang on from classic machines, bowling and food.

Here you go.. Jolly Imperial V(1).zip

Often there are no manuals or diagrams. The method I use myself is tracing the wires, where do they go? is there current on the wires compare with another string? Follow the wire back to the motherboard, to the right pin and see if you can trace to which Transistor. Transistors go bad over time. are there burnd risistors? also check if your lights are intact. and if you have continuity in the wires (no break) also check the diodes, if they are bad the string may not work either.

This could be possible. I can increase the resistance of the lamps. I have also replaced the lamps Good idea 😁

Sounds like the hole sizes in the sensors are the issue .I've heard about new light sensors being too bright in mpu3s before so lowering the light emission could be right .

Hello everyone. Took a bit longer, due to delivery problems and personal things. Here is an update of the photo sensors. Unfortunately the new sensors do not have the desired effect. They are super sensitive, which means that with 1 spin the cabinet goes crazy, and you immediately lose your points. I think the sensors are too big and therefore capture too much light. I want to test, by cover the plastic housing with black cardboard. with small holes. see if that works. also I still have problems with the LSI. where? I do not know with every spin I get win points. (Loos//Win) so far the update

It has taken me over a year to get registered on this site, i never seemed to get the email verification through but that now works and i have managed to do it. I still however keep getting the oops something went wrong message whenevr i try to view forums. Amongst my bunch of machines which range from mech to electro mech and mpu4, impulse etc i have a barcrest mpu1 nippy nudger with issues that i am trying to get some ideas on. Look foward to posting soon. Jim

Thank you for that, i can now view the forums after a year of frustration. So easy when you know.