Seems like there is no power to your motherboard. Check the replacement power supply and make sure it is set to your country power rating. What power rating are you by the way? Also make sure the fuse is not blown. Trace back the power wires that are connected to the motherboard, back to your power supply to make sure all connections are good, try unplugging and putting back all connectors. If your fan does not come on on motherboard or no LEDS then we will go from there. Start at the power connector I am pointing to first and then trace back from those wires.

IMG_4618 (resized).JPG

Without knowing your situation I can only advise following some basic troubleshooting technique:

Check the wall voltage with a meter.

Follow the wire from the wall outlet to the service outlet in the front of the game. Check the voltage at the thermistor etc.

Check the voltage at the on/off switch.

Check the fuse in the service box with a meter or tester.

Follow the wire from the service box or on/off switch the the PC. Find the ends, check the voltage.

Try to at least for now to see if there is actual voltage at the internal power supply board via the wires you traced.

Get back with the results and pics of your work so far.

Also double check your cables and verify they are plugged into the correct plug/socket. Sometimes they get interchanged by mistake.

Booting the PC is not a simple on and off proceedure.

Its an ATX system.

If power is available at the power supply and everything seems in order, then the power switch pins on the mainboard have to be briefly jumpered to start the current flow. This can be done manually or thru a relay etc.

If the ATX power connector is connected and power is available,
Im curious if the PC will start by jumpering the switch pins on the mainboard.

The PC isnt too complicated, if the ATX power connector and the 4 pin CPU connector has power available, it should boot, unless there is a mainboard fault. It seems that you have a replacement mainboard and it didnt fix the problem?

As was mentioned before, check the connections and check the power everywhere.

On a hunch I would suspect a power supply failure ( main fuse, broken wire, thermistor, bad power board? etc) of some sort before I supected a mainboard failure.

Guys I might be wrong here but correct me if so, but did JJP have a bulletin about replacing the power board because they used a wrong spec component on some of the boards at some point, the component was smaller then spec'd what was needed. And they way to tell if you had the correct one or not was that the component should have taken up the whole outline space for it. Is it the component that I highlighted in the lower area? If so that maybe be the issue if that blew.

powerboard (resized).jpg

Actually found it and it was the part I highlighted, you might want to have a look into that as your board does fall right into that time period of concern. Hopefully that's the issue.

Service Bulletin W-3_PS Inductor.pdf

My Hobbit wouldn't power on and I thought it might be the power supply. Turns out it was just broken solder where the main 120/220 line signal connected. I just used a multimeter to track the voltage until I found where it stopped.

Hopefully it's that simple of a fix for you.

You stated that the game booted with the old board, but there were errors.

Does the game boot with the old power board installed again?
I would re-install the old board and see if the games starts, even just temporary for a minute or so, regardless of errors.

If the game starts with the old board then the fault is in the new board or the installation procedure.

Sometimes when working backwards you will find the loose connector or a pin of a molex that pushed out of its housing or a broken wire.

It is possible for a power supply to kill a mainboard but, its very rare.

Generally if the power supply fails then no power is allowed into the mainboard at all and its protected.

In the event of a catastrophic short (melt down, lightening strike etc.) then the mainboard will fail but you will see blackening of the ATX connector on the mainboard. And it may trip the wall breaker.

The majority (but not all) of the mainboard components are rated for 250V but low current ratings, so yeah a direct short can be devastating. But again its pretty rare.

has the coin cell battery been replaced? i read some where 8n the manual about the chip having to always have power and u can only replace it while the game is on. u cannot replace it when the game is off.

just a wild guess. hope u get it working

Coin cell battery, but only change it when motherboard is running.

IMG_4615 (resized).JPG

The coin cell battery, whether or not its installed, will not keep the PC from booting, its purpose is to keep your CMOS settings intact so you dont have to type in the time, date (and specific settings perhaps), each time you start up the PC.

In the OP's case the pc isnt booting yet. All of the other errors can be looked at after it boots.

Tried the power-switch on JFP1 pin 6 to 8 ?

Thats what I was thinking as a test...
Or maybe put the old board back in as a test to see if it boots.

The OP says its dead.

Sounds like no power or service box fuse.

It's just a PC at the end of the day. Check all connections are seated correctly. Try putting the old board back in. Have you checked your warranty with the euro distributor ?

I had an issue with no power once and it was simply the power cord on right if I remember correctly had come disconnected. It looked connected but was not. Ended up being a stupid easy fix but I stressed for weeks on that.

Testing the power at the service outlet would uncover that fault.

Pinny80

Did you eventually got your woz working? Did you change the pc motherboard?
I am having same thing as your vid1 and vid2.

I bought from Freddy's pinball palace, Did register at JJP but never received the coil inductor issue and the free swap. Because I didn't know, my inductor coil burned together with some more components. No fuse was broken. Seems my motherboard is defect too.

Thanks in advance

Same no power to the MB issue here, it just died while in the middle of a game.
I tried all the steps in the brownout vid JJ put on YouTube, nothing worked.

Put a ticket in with JJ but it's been weeks with no update or response.

I used to have good luck calling them but I don't know if that has changed or not ?

ATX power supply behind the big metal box with all the boards, measure it's output voltages.

Power supply board inside the big metal box, check for a burned thingy on it.

LTG : )

My WOZ doesn't have an ATX power supply, it has the UPS board.

I did find this post for the same issue which I'm about to try the method.
https://pinside.com/pinball/forum/topic/woz-no-boot-up-on-power-on-problem-and-solution-bios-screenshots