DSA602A Random Power Off


Greetings! I recently purchased an eBay DSA602A. No errors but after it warms up or during an EA process it will make a pop sound and shut down randomly. Sometimes it comes back on it's own but will not stay on more than 5 minutes. The pop sound is a "static discharge to chassis" type noise which could just be the unit suddenly powering down the CRT after a fault. So may be unrelated to the issue.

My question is: where do I start?

Any help would be appreciated.

Thank you.

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