I don't know maybe it's the supermoon, but I had my Corvette, No Fear and Rbion go down in the last week or so. NF and Corvette are back in action, but I can't seem to lick the Whitestar board issue. I think I may have fried something when I took off the scoop to adjust the angle on it. I think when I unscrewed it from the top it released from the bottom of pf and made contact with something, but I'm not sure. In any case when I turn it on, I get nothing except some GI lights, No DMD flash with ROM version, no bong. Also the +20v and +50v LED lights on the driver board are off. Any help would be appreciated it. I have no experience with Whitestar sys.

Yeah..I was hoping it was just a fuse. I pulled them individually and rang them. All good. I think the clue is no +50v no +20v.

Sorry I should have mentioned it. I measured it, it's solid 5.03 volts.

I just pulled the cpu board...there is battery acid leakage...no damage noted. I neutralized the acid with a vinegar bath and installed an NVRAM. Also the 50v and 20v leds are lit after I closed the coin door...Doh! Still not booting.

Hi Scott, thanks I can't find VR1 and VR2, nor TP1 sorry.? I did measure CN1 all good, however Pin 3 was -13.70 and Pin 6 was +13.75. U212 Pin 28 was 4.95V. I should also add that the battery acid was fresh so there is absolutely no trace damage however the acid was wet to touch on the ROM and Memory chip.

When I turn the machine on I get no bong, no dmd, every now and again I get the GI's flashing on and off a few times. Also on the cpu L200 comes on and goes off. On the power driver LED L204 flashes.

20161125_212104 (resized).jpg

20161125_212108 (resized).jpg

Thanks again, I have to tell you I've checked about a few dozen threads on multiple sites and it seems there are very few resolution (and even how to guide) to the Whitestar system. To make it worst this is a modified Whitester so there is even less info on this boardset. Anyway I may have a clue I noticed on a couple of threads the board repair experts suggested to check the RAM, ROM and PAL chip for similar issues, so I started with the ROM and downloaded the latest version from Stern's site, I erased mine and tried 3 times writing to it. I erased and tried again, it failed all 3 times. I even downloaded another rom image from Stern's Monopoly making sure the RBION's image was not the issue. So I ordered a new ROM chip. As you know when I removed the cpu board I noticed the ROM was wet with battery alkaline leakage. So I'm hoping this may be the culprit. I will update once I get it. Btw, yes L200 was doing the same thing with the old RAM, I agree the watchdog circuit is holding the ssy down in perpetual reset, I'm guessing that's correct if it can't read the ROM?

Stoptap that's solid advice but I haven't had much luck with that, I even bought a Hakko Fr-300 but for some reason the eyelets keep getting pulled. Currently I have 2 boards with John Wart for repair, one was me trying to socket an NVRAM on a WPC, the other trying to replace a PIA on Data East. I did neutralize the alkaline and wash the board out pretty well, visually the board is pristine. I can't chance it, knowing the traces on these boards are even more fragile than WPC.

Update: So it turns out the ROM was indeed shorted out by the battery alkaline, I ordered a new one and it's all good. Thanks to both of you for help. For future reference, a good clue is when you turn the game on and got all the leds but there was no rom version flashed on the dmd then don't bother troubleshooting the cpu just then, because the rom version will flash even if the cpu is bad. Check the rom chip before continuing.