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Denon AVR-788 Receiver shuts off when cold when volume is turned up even with no input or speakers



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A Denon AVR-788 AV Receiver with a weird symptom, Even with no inputs and no speakers connected if the volume is raised when the unit is cold it will shut down. If you keep the volume low for the first few minutes the unit will work perfectly. I found a bunch of (20+) bad capacitors. Unit is working great now.
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Thank you to these people that have supported my channel by making a donation or by having me repair their unit.
Sherri Parsons Jim McCarthy David Arballo Steve Navarro Keith Claro Frank Conlon Graham Foral Bob Hendrix Jim Meschler David Jacobson Randy Fink Scott Kullen Obaid Khan Robert Brothers Timothy Edds Brian Gay Owen Flint Dana Dainels Tyler Bridge Dena Hamilton Paul Agbuya Samuel & Nancy Guich Dot Morgan Timothy Ritchel William Holloman Cynthia Adams Andrew Oros George Savage Graham Foral Paul Agbuya Philip Brown (Thank you for monthly support) Scott DuVall Christian Brenzel Russell Houtz Philip Brown Michael King Erick Pastor Robert Ettinger Christopher Cicero Heath Lasswell Timothy Ritchel Benjamin Rubio Michael Dukes Dot Morgan Casey Cane Teri DeLeo Kelly Knutson Howard Goble Diana Williams Reed Graham Christopher Wang David Ammerlaan John Johnson Shaheed Amirkhan Brett Sherry Joseph L Ozvold Sweidan Omar John Eggers Linda Kuo Daniel Pyles Melanie Branton Lisa Sklar Barry Marchant John Harper Larry Mcdonald Annette Lewis Howard Goble Hugo Tajimaroa M R Rajesh Dan Latorre Uri Cohen


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00:00 Intro
00:28 Look at the current draw
02:06 Look at the surr-R bias
04:04 49khz oscillation on surr-R ch
04:46 DSP and power amp schematic
06:06 Input board layout
06:47 Possible bad capacitors?
07:38 Cooling the capacitors
08:22 Separating main amp from DSP tests
09:43 ESR caps on DSP board
12:23 Bad SMD caps on HDMI board?
13:36 Twisting off old capacitors
14:08 Installing new capacitors
15:18 Tests after capacitor replacement
16:20 Audio tests
17:18 Closing words
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