Here on the forum, they told me to replace the backup battery, because the X108G starts up with 14.270, CW, 500 Hz. And also the time starts with 0.00 every time when I start the unit up. When I opened up the unit, I saw another battery then I expected. And it was soldered to the print. It was a MS920SE-FL27E, as the service amnual said. I only had some bigger lithium batterys, so I take a CR2032, soldered to wires on it, wrap it in some tape, and soldered on the 2 solderpoints for it, then with some double sided tape I stick it on the print. I know not the most beautiful solution, but it works. I only had to remove the battery a litle bit to the left, because otherwise it doesn't fit. But this works fine.