HP9915B with PSU problems

Yipppeeee! The 9915B now works. My remaining worry is that I do not know why! After removing things to allow me to check them in isolation and then putting them back, I started providing power to the different parts of the PSU. First the +12V supply worked, then the -5V and -12V supplies worked, then the +6V, and finally the +5V. Every time I expected the fuse to blow, but it didn't. So now the whole thing works fine. The 9915A still does not work, but I have found that C45 (the thin tall 390uF capacitor connected to pin 4 of transformer T2 via diode CR12) is shorted. That removes power to the V+ supply taking out the +6V and the +5V supplies. Now all I need is a replacement for C45 and I am in business. Many many thanks Tony. BTW the first time I looked at the 9915 motherboard I freaked out, because the PSU is all over the place. In some cases analog components are located right next to the digital logic. But with Tony's help and his schematics, I managed to map my way around the board. Now when I look at some part on the underside, I know which components are on the other side. Like an adventure game that you have played many times and have the layout in your mind. Real fun. **vp