What is error code ug1 (or u61?) - Panasonic DMR-ES30VS DVD Recorder/VCR

SOURCE: u61 error code

UMM the DVD top lid uses FOUR screws. The entire DVD drive is bolted to the chassis with 3 screws.

SOURCE: Error code U61 on a

The manual refers to the U61 as being a recovery mode. Have you left it at U61 for a period of time while it tries to recover?
U61 ≥There was a power failure or the AC plug was disconnected while the unit was on. The unit is
carrying out its recovery process. This process restores the unit to normal operation. The unit is not
broken. Wait until the message disappears.
You could always try to force it into standby mode and back out again:
Press [í/I, POWER] on the main unit to switch the unit to standby.
Now press [í/I, POWER] on the main unit again to turn the unit on.
If that doesn't take care of it, everything thing I've found points toward a replacement of components inside the system by a repair service. Hopefully you are still under warranty!

SOURCE: PANASONIC DMR-ES35V have error code U61

From User guide:
U61 • There was a power failure or the AC plug was disconnected while the unit was on. The unit is carrying out its recovery process. This process restores the unit to normal operation. The unit is not broken. Wait until the message disappears.

If fail unplug and hold power button for a minute or two and turn it on and repeat.