Unable to boot up dvr, stops with at error U99

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Error code details to many popular devices are given.

The U99 error is a "general communications problem". Were you trying to switch sources when you were recording? You shouldn't to avoid this error. That's what we did with my Uncles unit.

tengo un panasonic DMR 55 E con el codigo U99 que puedo hacer si alguien me puede ayudar se lo agradecere.mi correo es [email protected]

The "U99" error code signifies a "general communications failure."
It is not associated with one specific problem.
It can be related to the version of firmware your DVD recorder is currently using and it has been associated with the TV Guide on screen guide.

If your unit displays U99, turn the power off-unplug the
unit for 5 minutes, and reconnect the power.

If U99 reoccurs, please contact the Global Service Center Network for assistance.

Displayed when communication error has occurred between Main Microprocessor and Timer Microprocessor.Hold down [POWER] until unit powers off. Unplug AC power cord for five minutes then reconnect. If issue still exist have unit service.

A U99 error code signifies a general communications failure and is not associated with any specific problem. It could even be related to the firmware version of your DVD recorder.

Try turning off the power and unplugging off-unplug for at least five minutes before reconnecting.

If U99 reoccurs, you should contact the Global Service Center Network for assistance.

Good luck!

I downloaded and installed the firmware upgrade from 2005 (my machine was bought in 04) - after that it is now working fine!

Saludos : Yo tenia el mismo problema. Mi dvd DMR-E30 tenia el
mismo problema . Codigo U99 . Y no funsionaba nada.
Entre a la pagina de soportes de Panasonic y baje el Firmware.
Luego lo grabe en un cd ,el cd lo coloque en la dvd y la dvd se actualiso automaticamente. La dvd funciona perfectamente tanto
con DVD-RAM como con DVD-R. Esta solucion la saque de esta
misma pagina fixya . Gracias Fixya. Att. LACF

Hi there, this is what Panasonic say.... The "U99" error code signifies a "general communications failure."
It is not associated with one specific problem.
It can be related to the version of firmware your DVD recorder is currently using and it has been associated with the TV Guide on screen guide.

If your unit displays U99, turn the power off-unplug the
unit for 5 minutes, and reconnect the power.

If U99 reoccurs, please contact the Global Service Center Network for assistance.

Hi there, this is what Panasonic say.... The "U99" error code signifies a "general communications failure."
It is not associated with one specific problem.
It can be related to the version of firmware your DVD recorder is currently using and it has been associated with the TV Guide on screen guide.

If your unit displays U99, turn the power off-unplug the
unit for 5 minutes, and reconnect the power.

If U99 reoccurs, please contact the Global Service Center Network for assistance.