I have an Williams Hurricane Pinball for a few years now. Surprised to see we still use it quite "often" (let's say every few weeks lol)... Ran into a few problems that I was able to solve but can't solve this one

It refuses to start when we put the switch to "on"...

Here's a screenshot of what shows, I have circled the lights that goes solid "on" and those that doesn't lit. Usually the display shows properly, now it's all garbage!

Any help is welcomed, trying here before call the repair guy!

Thank you

20170611_164551 (resized).jpg

Thank's for your replies,

KenLayton: The +5volts would be from the PS inside the pinball or from a connector in this panel?

kevmad: It's indeed a floppy drive cable, the older cable was pinched and it failed I would say 2-3 years ago but yes, it's working perfectly

I don't know if it can help but here's the LED's descriptions and status taken from my original 1991 manual!

CPU Board
*D19-D21, Normally ON ***It's OFF***
D20, Normally OFF -- It's OFF

Power Driver Board
LED 1, +12vdc Switch Circuit, Normally ON -- It's ON
*LED 2, High/Low Line Voltage Sensor, Normally ON ***It's OFF***
LED 3, High/Low Line Voltage Sensor, Normally OFF -- It's OFF
*LED 4, +5vdc, Digital Circuit, Normally ON ***It's OFF***
LED 5, +20vdc, Flashlamp Circuit, Normally ON -- It's ON
LED 6, +18vdc, Lamps Circuit, Normally ON -- It's ON
LED 7, +12vdc, Power Circuit (motors relays etc.), Normally ON -- It's ON

Just need some more help on where to look for this High/Low Line Voltage Sensor that is supposed to be ON and where to find the +5vdc. I checked all the cables and fused so far.

Thank's again everybody for helping!

I checked every fuse on the power board for two things: Continuity, all of them are good but I have no voltage on any of them when testing in DC so I guess either power is not coming from the power supply (but why would the LCD show garbage and illuminate and also some of the leds?) or a cable is not ok but in the manual, the power board has very little information about all the connectors.

I feel stupid but to test directly from the power supply (the yellow/yellow-white 9 pins connector who provides 6.8vac), where would I ground myself? I have no reading from the 6.8v, nor from the 100v (violet)

FINALLY, found that the LM323 was the culprit... Ordered from China, both of them were not showing anything on the VOUT...

Now, new problem... Everything has been resetted and the "ENTER" button on the front panel doesn't work so I can't change any settings. Any ideas of what to check? I check on the connector inside, I found the pin, I also found the pin that goes to the CPU board but then, the key doesn't work, any idea of the troubleshooting steps for this

Thanx again

I posted another thread since it was a different problem, please do not reply in this post. The problem that solved this post problem was changing the LM323.