Sounds like it's in "audit mode" which can happen if there are no batteries installed or if the batteries were changed with the game off. Try turning the game on, then off, then quickly turn it on again. If that gets it working, you may just need to install batteries. Hopefully it's something easy like that!

Edit: And tape off those wires for the coin door switches for now! Don't want them touching anything they shouldn't be!

Pretty sure it should work even without batteries. I'd try installing batteries if you have some though, just to be sure. Have you checked voltages at the various test points?

Edit: looking at Clay's guide, it says the coin door has to be open when you switch the game on/off/on to get it to boot past audit mode. Forgot to mention that!

No, it kinda needs batteries to get to start mode, IIRC (could rememeber it wrong though), but you have more luck then i have with my JL since you have displays, i have switched out ROMS, soldered everything, new fresh 5101 NVRAM adapter installed on the MPU, and still nothing, just GI lights.

You could instal a 2101 ram if you have one. I use this ram when testing the cpu board.

I'd start checking voltages at the power supply board and at the test points on the mpu and driver boards. It's probably going to need the 40-pin connector replaced (male and female) and it may need new sockets for the ROM chips and RAM chip if they are the crummy Scanbe sockets. I'd definitely start by measuring voltages though.

Den,

If I recall the boards in this machine are really screwed up and they are prob not worth trying to debug the machine with. I wouldn't waste a lot of time on them.

Post a pic for everyone to see.

Did you ever get your BK working?

If so you might want to swap the board sets and see if the JL will boot up. It might even play with the BK boards but it will be wonky.

If you really want to test it you could swap out the 2 game chips.

Well i measured this on my JL

Powersupply 3 testknobs:
3.12.1
2. 0
4. 14.7

MPU testknobs:
5. 04.79
6. 02.33
8. 04.83
2. 03.83
4. 00.80
9. 05.92
10. 0 (ground)
7. 04.86
13. 03.89
1. 12.1

Might be helpful.

You can find the code meaning on a note in the backbox.

Or in case you dont have the note there anymore:

https://s27.postimg.org/k3p1btrdv/System_7_code.jpg

You having code 3 means IC17 Rom 2 Faulty.

And well, my JL have almost the same problem as yours, starts but shows only GI but no displays, and ive switched out 5101, all the game roms, and the 6808 ROMS on the MPU board, resoldered the 40 pin (+ every other contract) and is currently waiting for a Powersupply kit from Big Daddy to arrive so i can rebuild the powersupply to see if that fixes my problems, otherwise its either switching out the PIA chips or buy a Rottendog multiboard.

The chip with the yellow marking is IC17 Rom 2, if you remove it, make sure you put it back in the right direction, there is a small mark on
the chip which must correspond with the mark on the socket.

The rest are the chips i have and currently am replacing on my JL.

ComboWilliamsMPULarge (resized).JPG

They soldered the game rom? Huh, well you need to desolder that since it should be easy to take in & out with a socket.

You dont have the manual? Im working from the manual here, and IC17 is in that spot.

http://mirror2.ipdb.org/files/1338/Williams_1981_Jungle_Lord_Manual.pdf

MPU (resized).png

Btw, i heard that the game roms might be labeled wrong in some JL's, so you might have that problem.

Print the one i just gave you then in the PDF file

Rom 1 = 2716 eprom top right socket
Rom 2 = 2532 eprom middle right socket

IC26, IC20, IC17 and IC14 is the game roms, and i dunno if you can use other Game ROMS, but as long as its System 7 i dont think it will do any harm.

Before ordering ROM's, there's one more trick to try.
If it's even getting into audit mode than the checksum's are coming back ok.
You're VERY close to running the game mode.

The stuff from Fathom won't work at all. Bally vs Williams were completely different in that era.

Can you cycle through the audit's ok with the buttons on the coin door?
If so, try going down from #1 to #41, then back up again to #1. In system-7 machines this will actually get you out of audit mode if everything is ok with your 5101 RAM, and into attract mode.

-Hans

I do not know, i dont even have displays that shows anything, and after ive tried to switch sockets and the PIA chips im gonna simple buy new boards and hopefully be done with the troubleshooting for awhile.

Yeah, i know of the comboboards, but £199 + shipping though..... i already ordered new sockets and PIA chips, so im gonna wait and see if that fixes it, otherwise i'll sell the old boards as-is and buy the combo board.

Anyway, that is as far as i can guide you on JL, resolder all the connectors on all the boards, check the volts, rebuild the powersupply board, check the fuses, pull and reset the Game ROMS, switch the 6808, and switch the 5101 to a NVRAM (so you get rid of the batteries), check the sockets for the chips and switch to new ones, switch out the PIA chips, switch out the Game ROMS completely (remember to put them in right), and if all that dont work, well you can go deeper with one of those checkpens and check signals in the chip legs and soforth, or just buy a combo board.

Is that the interconnect wired together?

If so, maybe that combo board is your best bet. If I'm seeing things (flashbacks and all) then maybe replace the interconnect along with whatever sockets and headers you were going to replace?

-Brian

I know for a fact on system 3,4 & 6 that a bad 5101 will not let you out of audit mode.
They are known for going bad.
Also, do not use a 9 volt battery. It is designed for 3 AA batteries which is 4.5 volts.

Williams
Jungle Lord is system 7. Like Black Knight, All 7 digit display games
by Williams electronics made during the 1980's were system 7.
The only odd one was Alien Poker.

It still have a 5101, switch to NVram

Take redundant measures to eliminate static electricity from your person and work area.

Hmmm, well, mayeb you should check the connections to the powersupply board, and/or maybe recap it too while you are at it.

Game on and in audit mode. Good! If you have batteries and turn
the game on it should go to the game over mode. Or on and off
then on real qwick. ( as not to lose power).

note:2502____1 : *502__rev1 is cosmic gun fight?
Junge Lord is *503