N64 Powers On, No Output, Voltage Tests OK

Background:

A client brought me his N64; his little kid broke the yellow plug of his composite cables at the TV, and now the console won't output at all (lamp on, no video, no audio).

Testing:

I've tested it with multiple cables and can confirm the issue. Gone through the following steps:

• Cleaned inside and underneath the cartridge slot connector;
• inspected all pins of each IC;
• cleaned and tested continuity of AV port pins
• Tested voltage at 12V and 3.3V rails
• Tried different expansion/jumper paks
• inspected capacitors
• Tested voltage at each pin of the AV port (except RGB & Sync which tested 0 of course because it's not a modded system)

All tests were OK. Not sure where to test further. I'm leaning towards a combination of recapping (which I would've done anyway) and a new cartridge connector. Any ideas?