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- Posts: 2
- Joined: Fri Jul 09, 2021 8:17 pm
Inherited an HPLC machine that has had regular annual service, but has (recently? who knows, I only got here 4 months ago) had gas bubble trouble. The service tech said we probably needed new vacuum chambers. Opened the machine up and re-sealed the chambers (cleaned them out, cleaned buildup off the seals, re-set everything), closed it up and powered it on, but now there's no status indicator light after I turn the unit on.
To be honest I'm not sure if the status indicator light was working before hand, but the pump definitely isn't staying on after the initial 8-12 seconds of noise it makes.
Is it circuitry that is fried, or could a bad vacuum pump cause no status lights to come on? (it isn't the optical transfer unit, I opened the machine to confirm everything lined up, and even when open I get no LED output from any of the 3 LEDS)
Thanks for taking the time to read a post from a new poster.