Hello, I am trying to repair my Samsung TV power board. I have one diode that showed when I tested it with my Fluke meter contact through both ways and I have not been able to get it to show that again. Now it just shows contact one way. Is this a sign of it going bad? The diode is marked IN4746A. I can not find any diodes anywhere with this number for sale other than an IN4746 zener diode and this diode does not look like a zener. It is black with a silver stripe on one end. Is there any diodes that anyone knows that would work in place of this one in case it is bad. I also have a couple of capacitors that look to me like are bulged just a bit on the top so I am going to change them also. I was also wondering if anyone could tell me a replacement for them as I don't have any with the correct values. They are 47uf 50v. Should they be replaced only with the same uf rating. I know that I can go up on the volts but not sure on the uf. Thanks and any help appreciated.