Instrument Crash Solved by Shaking, Banging, and Tweaking

Intoxilyzer 5000 64 Series Upgraded to 66 Series

Intoxilyzer 5000 in need of maintenance. Second start. Instrument crashes again during start-up diagnostic RAM Check 2 error. Operator solves problem by tilting, shaking, banging, wiggling wires. Instrument resumes diagnostic and prints "Diagnostic OK". I