These U23-U24-U25 DC to DC circuit is quite complicated and difficult to solve if there is a problem with this circuit. Similarly, the parts are difficult to obtain, and often too expensive. That's why I'm working with this solution, the use of a DC to DC pcb. Of these are many species for sale on ebay. First thing to be done is to remove all the components that are related to the supply of 1.2v. As for the 3 caps, I have removed two of them, just to see what happens and I also have removed the coil L42 on the parts side. Then follows the connection of the new system. As input voltage I first tried the 12v but as a whole needs to go to the 1.2v, this is a bit exaggerated, so I chose the 5v as input voltage. The total amps consumption is low, so the 5v circuit could handle it. The adjustment must be done before it is connected to the 1.2v circuit. Best is to have a 6 or 12V lamp and connect it to the output, and then adjust it to the 1.2v. If this has been done, then this output voltage can be connected to the 1.2v circuit. As input for this 1.2v circuit I have chosen to use the two 000 ohm resistors, basically the same as the previous voltage supply. Insofar as I have it working, and all the features of this test print work normally. But there is still to solve some small problem. The diode on the PCB get pretty hot, so the project is not completely finished yet. Wire Red is +5v, Blue is Gnd, White is the 1.2v + output to the circuit. It's working but it is still in the experimental state, so if you are planning to do it, do it on you're own risk. The text/photo's from this message may change if needed. Update.......... After some more experiments by modified a second good working motherboard this way it seems not a good way as a alternative solution. My next test was to use 12v input, and adjusted to the 1.2v. This because when using the 5v as input, the total amps consumption rises, with 12v input it doesn't. But further it works, the receiver seems to work fine with this solution. However the Dc to Dc module becomes to warm/hot to use it for real. And so, be aware that this project is still experimental, it has some issues.