My Roland XP 30 encountered user memory damage and cannot be reset to factory preset because of errors in the screen

Best to contact Roland directly. Here are the links-
Roland Company Contact Us
Support Roland

If you buy a second hand, it may have been damaged in mini switch (tact switch) under the WRITE button. You need to replace the tact switch. Easy and inexpensive, you can do yourself, only with a little knowledge of soldering
.

Tact Switch:
You may also try the FACTORY RESET.
Restoring the GT-10 to the settings made at the factory is referred to as a "Factory Reset."
Not only can you return all of the settings to the values in effect when the GT-10 was shipped from the factory, you can also specify the range of settings to be reset.

If you do this"Factory Reset", all the setting on user memory (that you create) will be erased, so backup your setting before doing this steps.

For more detail on "Factory Reset", read the GT10 user manual:
roland.com/support/article/?q=manuals&p=GT-10&id=1810803

Mute Switch/Mute-Clip LED :

• This switch mutes all Aux, Group and L/R sends from the corresponding channel.
• This switch is equipped with a red LED that will illuminate when the channel is muted.
• When the MUTE button is out,the LED functions as a Clip indicator that will illuminate at 2 dB below clipping.
• Muting the channel does not prevent the PFL signal from being sent to the PFL/AFL mix when the PFL Switch (12) is in.
• This switch mutes its respective Group send from the Group channel.

Go to page 11 in this link :
Peavey FX Mixer Series Operating Manual

You can also try, Restoring Factory Settings, in the Utility Menu Options.
Go to page 16 in ths link :
Peavey FX Mixer Series Operating Manual

CAUTION:
Restoring the factory settings option resets your mixer's presets, reformatting factory presets and erasing all other user presets. (This option is handy when your venue has permanently changed and all-new presets are required.)
Once confirmed, the presets are not retrievable and will be permanently lost.
Should you select this option in error, a warning screen allows you to cancel the procedure.

It's likely a coin battery, like the type in a computer, used to keep the bios or settings ram user settings (whatever)memory

Press UTILITY, press F6 (MENU) twice to select Factory, then ENTER. Press F6 (EXECUTE). Use the dial to turn Memory Protect OFF if necessary, press ENTER, then press F6 (EXECUTE)
Guide: https://www.rolandus.com/assets/press_media_resources/Factory_Reset.pdf

There could be several reasons for your Kurzweil PC2x keyboard resetting to factory presets and purging all user data. It is possible that there is an issue with the keyboard's internal memory, or there may be a problem with the battery or power supply. Another possibility is that there is a software issue with the keyboard, such as a bug or a conflict with other devices or software. In order to troubleshoot the problem, you could try resetting the keyboard to factory settings and then reloading your user data to see if that resolves the issue. You could also try using a different power source or battery to see if that makes a difference.

I had this problem and was about to send it back to Roland but tried a Factory Reset . It managed to fix it self but it has happened again so I woul dbe interested in finding a more perminnat solution .
Did you fix the probolem?
robin

Press Disc Utility > Choose Option 4. SOUND > Press Enter > Choose Option 5. PRESET > Press Enter > Switch off Write Protect if its on & its Done : )
COMPLETE

Somehow you have activated the mode to download a new operating system into the unit. It likely is expecting the new SW to be presented form source such as MIDI, USB, or stick.

Get it out of that mode before something gets clobbered. DO a Factory reset which will consists of holding certain buttons and turning power on. Find this procedure in your user manual.

On page 29 of your user manual is the procedure to do this. You can download a manual at the Roland site.

http://www.rolandus.com/support/product_manuals/?group=5