Tunerslot voltage measurements, with and without tuner. Voltage overview from the HG001-01 Tuner connector. Similarly, a overview of the compounds as an example, pin A goes to pin A. See this image, Tuner slot ohm/vdc measurements with destinations. Measurements where done between the ground and the measurement point, without tuner connected and all caps unloaded. Click on the image for a normal view. Tuner voltage or Ohm measurements, tuner connected, by Vcd completely started. BSBE2-401A and BSBE2-801A Ohm measurement data. TIP: Tuner issue Dreambox rebooting when trying to scan. Probably a wrong tuner version, try a different version such as rev. M. Problem, Dreambox 800hd reset / restart spontaneously during startup and or channel switching. Without a tuner, it will start normally, changing the tuner does not help. Other solutions such as the replacement of the U18, or the resistors / capacitors around the U18 will not help. Possible solution, place a 510 ohm resistor on top of the capacitor C276. In my case, this modification works perfectly on a Rev J board. Tested with a Rev J, K and M tuner. If you have a spare board you can find this resistor 511 at R212、R215, R235 or use a old trough holes 510 ohm resistor. Problem.. After an update, the tuner is no longer present, Could be a wrong or corrupted image file without the correct drivers for the tuner. Upload the appropriate bootloader and software which is suitable for your sim card.