Black screen KRC2

1. power down KRC

2. get new CR2032

3. replace dead CR2032 on the KPC motherboard

4. connect PS2 keyboard

5. place PWR_ON jumper of motherboard

6. powerup KRC and use keyboard to enter BIOS

7. load KUKA default settings

8. save BIOS settings and exit

And it will be like that until you replace CMOS battery, enter BIOS, load KUKA default settings and SAVE them....

Then probably the cmos in rtc is broken. Haven't heard about that issue a long time, but in former days this happened sometimes on standard pc Mainboards. So you have to change the rtc (normally not easy for a non electrician) or the motherboard or live with it.

Quote from Siul

I have follow all the steps … replaced battery…

before you start hacking motherboard... are you sure that battery you installed is good one? how did you determine that? are you sure that contacts are clean?

are you sure you installed it in correct orientation?

i have seen several times people "replace batteries" without paying attention to detail, grabbing any old battery that may be sitting on the shelf for eons, not checking if there is corrosion (at or near socket), not paying attention to polarity....

just saying....

hello Siul I'm facing the same problem ,how did you solve it?

called it

When Kuka is loaded to default settings, are the programs or system files in the memory also deleted?

No, this only means the BIOS settings.

okey thenk you so much my friends.