iDR-8 Booterror, no boot, only display backlight, no text in display

Hello everyone,

I have a problem with an idr-8. The power switch can be pressed, the device tries to start, but does not boot up. The display becomes brighter, but no text appears. Nothing can be read on the display, only the backlight of the display is visible. A connection to the idr system manager is not possible, the device cannot be found.

I measured the voltages on the power supply and saw that they are all present. The only thing that stands out is that the backup battery no longer looks good, but still has 2.3V when I measure it. I have ordered a new one. Could the fault be coming from there?

Does anyone have any advice for me? Or can I get a complete service manual for the IDR-8 somewhere?

Many thanks

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