DENON AVR-X6500H HAD THE BLINKING RED LIGHT OF DEATH. DID PHYSICAL DAMAGE CAUSE THE ISSUE?

A customer brought this unit in with the complaint of the blinking red light of death. I did get it to act up and I believe it was caused by the speaker leads shorting to the chassis on the jack that had physical damage.
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Samuel & Nancy Guich
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00:00 Intro and a look around
01:55 Initial power on tests
04:18 Power amplifier tests with the voltmeter
05:16 Speaker bypass test
05:57 Disassembly
09:47 The carnage
10:55 Straightening the back panel
11:56 Tests after repair
12:56 Final thoughts
13:25 Closing words