> Controlled coils always have power, John. > powered up the displays may flicker than go out for about five seconds. > Does the relay trip briefly shortly after the game is turned on? When
HOUSE FLIPPER GAME FUSES DRIVER
Seems to me to be between the MPU and Driver board.driving me nuts. It won't work in self-test or in game mode. Plus, I can engage the relay by grounding the transistor on the driver board. > I measured and it has the correct coil resistance and the diode is good as well. > Are you certain that the winding in the relay coil doesn't have a break? > Is it possible a driver board or CPU chip is bad along the path to Q1? Maybe a 7404? What doesn't make sense is that both the HH and BH board sets would have the same issue. I also checked for any breaks in the board paths, but didn't see any or hear any with the DMM. > Checked continuity last night on the MPU-Driver Board connector and all is good. I'll also look at the edge connectors on both boards. I didn't check continuity on those when I replaced the wire, so I'll check that out tonight when I get home. > The interconnect I'm using has all new wires/connectors - bought as a pre-terminated replacement wire set and reused the existing connector housings. > I was thinking that direction since the relay does engage via transistor ground from the driver board, but not via the MPU self-test. > check for continuity on the connection pins for that G.O. > How about the interconnect between the MPU and Driver board? Did you I can't figure out why the game over relay isn't latching. Self-test won't activate any solenoids since the game over relay isn't engaging. I then swapped the BH MPU along with the driver board (changed the game ROM), but got the same result again. I originally thought the transistor was bad (tests good) or the driver board had an issue, so I swapped my Black Hole driver board but got the same result.
![house flipper game fuses house flipper game fuses](https://guides.gamepressure.com/house-flipper/gfx/word/110066443.jpg)
> If I ground the Q1 transistor, the relay engages as it should. I've traced it to the game over relay not engaging when a game is started, and if I hold in the relay manually all solenoids (pop bumpers/slingshots) work. Basically no flippers, no slingshots - nothing solenoid controlled.
![house flipper game fuses house flipper game fuses](https://cdn.shopify.com/s/files/1/1366/2939/products/apps.528.13518543789452586.d00503fa-1953-4be5-a205-5e65a56ab2f0_efdbc370-ed38-46de-9bc9-0a8907ef7168_1024x1024.jpg)
Everything works - displays, sound, scoring.except solenoids. > I'm very near the end of a complete Gottlieb Haunted House restoration and I've run into an issue I can't resolve. > On Tuesday, Januat 2:00:21 AM UTC-5, John Robertson wrote:
![house flipper game fuses house flipper game fuses](https://i.ytimg.com/vi/nh4zuyi7vVM/mqdefault.jpg)
> On Tuesday, Januat 11:45:39 AM UTC-5, wrote: > On Wednesday, Januat 10:56:59 AM UTC-5, wrote: > On Wednesday, Januat 1:53:27 PM UTC-5, Gott Lieb? wrote: > On Wednesday, Januat 2:33:24 PM UTC-5, John Robertson wrote: On Wednesday, Januat 3:55:18 PM UTC-5, John Robertson wrote: