Let's Repair and make Safe this Mesa Boogie Mk I - Part One

This stunningly beautiful Mesa Boogie Mk I arrived with the report of “No Sound”. To bring it back to all its glory you’ll see a tale of wow. This gem had many issues ... that offer a good learning opportunity for you. The video was too long, but the learnings were too important to edit out. So, here is Part One.
Video Index
00:00 Introduction
00:16 Beautiful Exterior of the Mk1 Boogie
04:08 The usual fuse problem
07:06 Unlabelled tubes
09:45 How to properly test Filter capacitors
13:45 Disappointing wiring quality
17:43 SLOWLY apply mains voltage to gently wake the Mk I
20:46 Input socket noise – Step One: try Cleaning
24:35 Input socket noise – Step Two: improve the grounding of the jack
30:07 Locating the hidden filter capacitor and replacing series reservoir capacitors
36:30 Testing the power tubes
39:30 Why erratic plate current?
40:45 Testing for leaking coupling capacitors using a simple capacitance leakage tester
44:40 What to look forward to in Part Two