Don't toss the other power cable out yet. As someone suggested, clean both the contacts in the connector at the end of the cable, as well as those within the fuse blocks, and whatever connector or wire you have on the power supply end.. My TS570 went to visit Cliff Holland with that same low output problem. He went through it, found nothing out of place, then asked me to check the voltage at the business end of my power cable. It was 11.7 volts, with 13.7 volts on the power supply terminals. The cleaning job, along with a similar treatment for the power supply terminals just in case, fixed the problem. To clean the fuse holders, I removed the fuses, blasted the holders with canned air, then re-inserted the fuses. Either the air, or the physical movement of the fuses did the trick. Mike Duke, K5XU American Council of Blind Radio Amateurs