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I'll do my best to describe the strange issue... I received a dead 1.6 xbox. Wouldn't power on. I changed all the bulging caps that were noticeably damaged. NOT all of them. (Maybe I should) Now the xbox powers on and works flawlessly, HOWEVER, when I power down the console. The console doesn't power back up. But, when I pull the power cord from the back and let it sit for a bit, it can power back on normally. I tried doing a google search and search this site with no luck. Help! Ideas?

I am repairing xbox 1.4 for a friend. His box is having power supply issue. There is not enough volt to run the hard drive. I used external 12v/ 5v source to power the hard drive and the system boots up fine. The dvd disk drive is also working fine as it is connected to the xbox power supply. I took the xbox power supply out and didn't notice any bad caps or bad solder joints. With everything connected and powered up ,except for the power to the hard drive I get the following voltage values. Orange = 3.3V, Blue = 3.3V, Brown =3.3V, Red = 4.48V, and Yellow = 10.5V. I tried adjust the pot and that is max i can get for red and yellow wires. Which caps do I need replace for these two voltages ? or is there something else i can check? Thanks.