Making a housecall to inspect and estimate, I found a well-preserved but inoperative set. It was found the 2-amp fuse (good move Zenith) was open. That explained why it stopped working after moving it to present location, so I removed amplifier, tuner and Cobramatic style VM player. No way did I want this console in my garage now, its bench season!
The player was fitted with a "power point" style cartridge, which has an integrated stylus/ceramic element that "plugs in", I was surprised to find the player in good condition with serviceable idler pulley and other rubber parts. What I did not expect was to see the factory wiring mistake on the stereo phono cart wires. The left side was grounded and right side connected to both preamp leads! This never sounded good from new Im sure! I have found wiring mistakes in Motorola and RCA chassis too! I swapped out for a EV5632-HLF and Tetrad plug, did not even need to change terminal lugs. I assume this was the worst it could get, as the VM players always need a good bit of work to restore operations, but it was the easy part compared to this 5F29 amp. The player sounded excellent and played right on speed.
After replacing 14 wax-papers, four electrolytics and one cathode resistor. I was ready to power up this AM and it blew both a 3 amp and then 2 amp fuse. Maybe time for a dim-bulb tester but I suspect
the typical Zenith troublemaker, a bad power transformer! I see no wax drips, smell or sign of overheating 
which normally accompanies a shorted primary winding. Being that the 5Y3 tested OK, this may have been caused by a voltage surge as can happen when an electrical system loses its Neutral Conductor and current imbalance on your two lines of 120 causes one line to drop while the other line surges the same amount, approaching 240 volts! This is WHY we place X2 and Y2 capacitors across the line, where there is a very good case made on https://www.justradios.com/safetytips.html
transformer* that is an exact match. I put it in last night and tried it this morning, all works as intended even thru my bench speakers. Just need to hook up the cobramatic with its new cart and see how extended stereo affects a stereo source, not just the mono radio source. 
These must have been flying out of the sales "salons" of old, maybe it was marked down as the inevitable sound would not have compared well to a similarly equipped one wired correctly. You can bet the TV guys had to work on these, as many were installed in BW TV combinations (no Zenith color until M.Y. 1962)