Just picked up a Rollergames last month. Fun machine for sure. Everything was working fine when I got it but had some funky voltages going to the display so decided to recap the power supply. Was getting -/+ 124v on both HV outputs, with ZR4 completely missing on the board and ZR2 having been replaced and looking sketchy. After the new caps and some new 91v zener diodes the positive side was good to go at +91v, but the negative side was still -124v. Stupid me did not order the MJE15030 and MJE15031 transistors which is most likely the problem since I changed everything else around that circuit and still have the wrong voltage. After taking a closer look, someone had stuck an NTE55 in there at some point that has obviously failed. Hopefully once I pop a new one in there everything should be good to go. Also still need to change the 39K resistors but they're pretty close to spec so not urgent. Here's some before and after pics.