Rigol 1054z missing channel 3 & 4

[adminics]

On Rigol 1054z suddenly missing Channel 3 and Channel 4. No reference to Channel 3 or 4 anywhere in menus, only Channels 1 & 2 show at bottom of screen, button lights do not light.
Is there a setting that disables these? Something I am missing?
Anyone seen this?

Firmware 00.06.01

Thanks

[2N3055]

You flashed wrong firmware for RIGOL DS1202Z-E on it..?

[MarkF]

The latest firmware for a DS1000Z (4 channel) is 00.04.04.04.03 from here:
   https://www.rigolna.com/firmware/

Follow along this thread to restore your scope:
   https://www.eevblog.com/forum/testgear/new-rigol-ds1054z-oscilloscope/msg3220616/#msg3220616

[Fungus]

On Rigol 1054z suddenly missing Channel 3 and Channel 4. No reference to Channel 3 or 4 anywhere in menus, only Channels 1 & 2 show at bottom of screen, button lights do not light.

"Suddenly"?

Did nothing at all happen to it that might have caused this?