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The IC has input power on the right pins but 5 and 6 should not be near 0v. Pin 6 should be ~3.7v and pin 5 should be ~1.5v. If those are accurate readings and nothing is shorting those pins to ground, the IC looks like it's damaged. In most cases, when the IC is damaged the 5v reg is off but yours is dead on.
With no power appled to the amp, set your meter to ohms and measure the resistance between pins 7 and 6 and then between 7 and 5.
With no power appled to the amp, set your meter to ohms and measure the resistance between pins 7 and 6 and then between 7 and 5.
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