I have a Arksen DC Bench Power supply. The model is a 303D and is rated to 30 volts at 5 amps. This has worked fine for me until recently when it stopped allowing more than 9.1 volts to display on the voltmeter readout. The current is still fully adjustable and my multimeter confirms the voltage limitation of the supply. Does anyone have an idea of why this might be happening? I am not afraid of digging into the device to see if I can resolve it but I thought would get opinions on if I am wasting my time, etc. I am also prepared to buy a new supply and would also appreciate any recommendations of brands you might have experience with that have have provided good reliability. Thanks for any information provided.