i have a royal flush deluxe system 80a does that get me into the club

I have the same machine Dragon with the same hack a switch add .Press the button adds a game then takes the game ,same problem will not holding high score and wont allow more than one credit .Checked the ram at pin 22 has power of 3.6 v .So is this just a ram with garbage in it .

I have done all of that and still has the problem will change the 5101 chip c if that makes a differences.

Problem solved .Started with doing the ground mods to the mpu and driver board the power board was already done ,then i took the old 5101 chip out and noticed on the board that where pins 18 & 19 go that they are connected together on the same trace on the top of the board , so after putting in the new chip i tested all the traces to the leg of the chip the only trace that was not working was 18 , pin 18 & 19 are both connected to ground so i add a splash of solder across the two pins at the back of the board plugged it in went into book keeping mode cleared 1-10 Added new scores in 7,8 & 9 for free games and added a high score in 10 and game was working again with high scores and can add more than 1 game , so turning machine on and off now keeps high score no problems all fixed . I would say to anyone that has this problem first 2 things to do is ground mods on all boards and check pin 18 make sure there is ground there.

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Hi i have started a thread for help on a solar ride machine if anyone can help out would be nice.
https://pinside.com/pinball/forum/topic/gottlieb-solar-rider-system-1-fault-with-specials#post-5455454.
Thanks Raff

Use a flat metal paint scraper put it between the cabinet and the rail and slowly wedge it up and down next to the nails you should see the nails move when you get a few mm get a pair of pincers and pull the spiral nails out.
Raff

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Started working on a count down every thing working except pop bumper,left flipper and both sling shots not working.
Raff

All fixed thanks cheddar.
Raff

Count down has blown the 1amp fuse next to the transformer Everything was working good before the fuse blew but now there is zeros in all 4 displays and nothing in the credit display can not start a game and all three boards are brand new.
Raff