I am new to this series of CPUs. I have this Starkey's Shootout and it doesnt boot.

-Upon power up, all 5 driver board voltage status LEDs are all lit.
-The blanking LED on the driver board blinks at a steady rate.
-New batteries, and zero corrosion
-The CPU LED status LEDs are lit.
-I have exactly 5V at the CPU.
-I swapped out both of the 6809 CPU chips on the CPU, and also the 6116 RAM.
-The fuses are all good
-I reseated every chip on the CPU and the DMD board.

-NO playfield lights are going (does have GI)
-The dot matrix display shows no sign of life!

Any ideas?

I can get some pictures. Anything specific? I actually bought this not working. One thing...the LED status light on the driver board does not light at all. If I reverse the ribbon cable to the drier board, the status light blinks. I guess these 2 situations indicate 2 different problems, and the LED is supposed to be solid? I have head that getting a better socket for U212 NEC chip has solved this issue.

Well, here is a pic. There is no ROM chip in U37. I thought maybe it didnt use it. However, there is indeed a chip here in the manual, but it says its only for "8MB Use",and the jumper by the NEC RAM chip is at the 32k, not the 8k.

ss.JPG

Thanks guys! Just noticed something odd. I just flipped it on to test the display power, and the CPU was not it the machine. Guess what...the display came on! It said revision 2.01. So, this does indeed work, but I tried several power ups and it only boots about every other time. Weird...

Are you saying all the ROMs? CPU and display? I did order a PAL last night

One question...On the CPU...do I just replace the main 3 ROM chips, or do I also need to replace U7 and U210?

I see that U7 is a 27512 and that U210 is a 27c040...but the folder with the ROM images is confusing. One says SSCPU.211 and the other says SSSNDU7.101.

SSSNDU7 is obviously the sound ROM....but what is SSCPU.211? Is this U210, by the PAL chip?

Ok, I found the chart on sterns site. 210 is the CPU chip....I will put that in also...

replaced all roms....no luck. Will check back in when my PAL gets here.

Ok....my PAL chip took a month to get here. Got it today and put it in. Still no action!!!

Now that I have replaced the CPU, RAMs, ROMs, and PAL....what next?

Also, if you look at the pic I posted above, can you see the 6116 RAM chip? The manual says 6264/6116. They have totally different pin counts. Is the 6116 above in correctly?

Ok, I think I may have found the issue. I went through all the sockets and tested for continuity. That was good. Took off the driver board and found that pin 3 was broken off the Dallas DS1232! I wont know if this is the only problemuntil the chip arrives on tuesday....but Im keeping my fingers crossed.

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I used the MC68B09EP. Is this ok?

I suppose this means I need to clip pin 3 of the dallas chip when the new one gets here?

The blanking light just comes on solid.

So confused by this thing!

Ok, I tested a few more things.

-All of the fuses are good
-all voltages to the cpu is good
-I measure 5 volts on the blanking pad of the CPU
-As a precaution, I replaced the 5v bridge rectifier.

Still....no progress.

I put the new Dallas chip in the driver board. I notice something interesting. Pin 1 of the driver board dallas chip pulses from 0 to 5V and the indicator LED is out. If I unplug the ribbon cable from the CPU to driver, Pin 1 of the dallas chip is held constant at 5V and the indciator LED flashes.

Can someone give me some insight on where to look now? I have a scope if that helps.

The LED on the CPU is constantly solid.

Ok, I think I am as far as I am going to get on this board without trying to replace every chip on it.

I hooked my scope up and I have a signal at the 20mHz and 6mHz pads. I also have signal at Q and E. However, I see nothing at SND_RESET or SND_FRIQ.

I do have activity on the CPUs and RAM chips.

Who works on these and has a fast turnaround time?