On Wednesday, January 25, 2017 at 11:05:25 AM UTC-5, wrote:
Hi,

Note: I did electronic service work for many years.
Note: This DVD recorder does NOT use a computer. It has
AV inputs and outputs plus a built in TV type tuner.

My Panasonic DVD Recorder DMR-ES20, when plugged in (AC)
takes a very long time to initialize (rolling "o"s) before the flashing
"12:00A" appears. Also, when I turn it on, "Hello" is on for a long time
(not as long as "rolling o") before I can use the recorder.

I checked every electrolytic capacitor in the power supply, plus some
others (ESR and capacitance test). I replaced a few that were in early
stages of going bad, but that did not fix the problem.

Has anyone fixed this problem (same model with same issue)?

Thank You in advance, John

I'm going to go out on a limb and guess this Panasonic is new to *you*. I remember these unit to be extraordinary. no-painfully slow to boot and non intuitive in operations.

This is an early machine that uses a comparatively slow processor and memory, and requires a lot of software to run. Probably normal.