I have run KRC2 (KSS 4.1.7) KR 150-2 for about three years on occasional weekend without any problems but a couple of months ago it started booting only with 2nd attempt. On first trial pendant was dark and red lights were blinking in controller. Power off/on always worked to boot controller on second attempt. Message "Buffer battery voltage low PM1" made me replace batteries but to my surprise problem with robot not booting on first power on attempt persisted.
I could have lived with that but yesterday much worse thing happened. I accidentally left CD (with just some robot code, no other software) in the PC CD slot before boot and obviously robot attempted to read it it on the start and I did two silly things: 1) I switched power off/on during boot, and 2) when pendant showed the blue screen about driver (see pic) I did not press any key as suggested but powered KRC2 down and up again. This resulted now in KRC2 not booting fully but stopping at "Cross 3" screen (see pic) with red & green lights blinking inside controller.
Disconnecting batteries and then booting a couple of times (my attempt at cold start) did not help. First time pendant dark as usual. Second time pendant did not go past Cross 3 again. All consecutive times of booting with batteries always stopped at Cross 3 screen and red & green lights inside cabinet. I assume that startup not working on 1st attempt and stopping on Cross 3 screen are two different problems but I cover it all here to get the status right.
I dearly hope it is some trivial thing I can do to get full boot again. Any advice much, much appreciated.