*** M E M O R U M ***

I would source an S04, now that you have the socket, it’s an easy replacement

Thanks I will certainly try and find one. And thanks to you and Martin for all your help, it's been really appreciated and without it I probably would have given up ages ago.

Removed the old chip and put in a socket. Found a PC74HCT04P I already had. Took a chance its specs are close enough https://i.ibb.co/rfRMVJR/IMG-3256.jpg And now to switch on the power and... We have VGA output :D https://i.ibb.co/cwL6RTJ/IMG-3255.jpg Sound is also now working correctly I am now a ...

Hmm that chips been changed before by the looks of it. Currently its a 74HCU048I.

OK so I'm getting the hang of this logic analyser thing I think. I have hooked up and test the Propeller shows activity on A0-A7 and DS0-DS7) however as per the below Pin 30 (Channel 0) is showing a constant Low, I believe this is a CLK so shouldn't I see the frequency pulses or is that just on an o...

But have you tried another monitor? (I know that the monitor works with another video source, but do you have another?) Yep 2 monitors and both tested with a known source. I also just tried desoldering the lead from the CFXII and sacrificed another lead to solder that in as a test. Still nothing. N...

I think I've found the problem. Pin 1 of connector 6 is GND and should bell through to pins 6, 7, 8 and 10 of the VGA plug which it does not. Those pins are however connected to the shield ground. I've been tested to the main GND until now :oops: Nope scrub that my mistake I cannot replicate the VGA...

So, at this point, the only thing that is not working is the VGA output? Yes just the VGA If so, can you check the short VGA adapter cable that the internal CFX-II uses Belled out to end of VGA lead from Propellor pins OK (resister value show as they should) It’s probably worth double checking that...

Replacement serial eeprom arrived today. Quick program and verify with Monitor V11 and installed. GRRRR... Black screen :evil: Tried swapping the old propellor chip back in... Black screen Tested Reset - C "CPM Boot" displayed on composite as expected. Reset - M or Space gets me the Ready ...

That should report 120 for the first 29 passes through the loop and then 0 from, 30 onwards after the propeller resets. The propeller output will show the test card. IF the test card appears then that would indicate an issue with the reset signal getting to the propeller, unlikely but worth testing...

OK so the propellor chip arrived today and was promptly swapped in. Black screen still. Although occasionally I will get this through the composite which is new behaviour https://i.ibb.co/LCRCvQ9/IMG-3250.jpg So the extra 32K is showing up OK. Pressing Return I get the Ready prompt and can run the U...