Nintendo 64 PAL – No Signal After Reassembly

dang74 Sorry to bother you, do you have any updates?

Okay, a more substantial update for you.  I took the N64 apart today.  The encoder I have is the AVDC-NUS.  I did some probing with no cartridge and no jumper pack installed.  I will add a disclaimer here.  I have an old 50MHz analog scope so these pulse trains are at the limit of scope"s capability.  In fact instead of square waves I was seeing triangular peaks.  Anyway, the pins that correspond to D0 through D3 had the same type of signal... and in my judgment their duty cycle was less than 50%.  The pins that correspond to D4 through D7 were 0V flat line.  The pin that corresponds to the SYNC signal had an AC waveform.  It's duty cycle was greater than that overserved on D0 through D3.  The pin that is supposed to be the clock had a sine wave.  I suppose it's really a square wave but due to the limitations of my scope I observed it as a sine wave.  My observations are more or less consistent with yours... it's very possible that all your electronics are fine but a poor contact with the jumper pack or cartridge is messing things up.

You can see what I have measured so far here
https://docs.google.com/spreadsheets/d/1GrGj95BcU5GfZvYtvYVBCxaKokOzlmxlZgRDTHP93-8

DENC sheet in this case

I see a sinewave on CLK too, it's a 50Hz wave (my digital oscope is 100Mhz)

I've checked, cleaned again and again, also reflowed the two connectors (card and jumper pack), but I can check again.

Maybe by opening a card and the jumper pack I can check resistance directly from the two boards and the destination of every signal?

I like your idea for checking the resistance to the jumper pak to ensure continuity.  You could use the same approach with a cartridge as well. That is of course if you don't mind opening a cartridge up.  Before you do this, I was wondering if you tried using the original jumper pak.  I seem to recall at some point that you switched to a new one.

The console was sent to me with an original expansion pack (the one that has red plastic). It was working with that one. Then when the console stopped working, I've bought a jumper pack (not original, completely black) but that doesn't changed anything.

in the spreadsheet you list d0 - d7 is there data moving on those pins. what ics does this use 

in the spreadsheet you list d0 - d7 is there data moving on those pins. what ics does this use 

Hi, yeah if you click on the pin name in the DENC sheet you should see an image of what I'm measuring there (activity on D0-D3, 0V on D4-D6).
I'm measuring with game and jumper pack inserted