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Help! :) Gigabyte HD 5850 componet identify B200

post #1 of 5
Thread Starter 
I was trying to repair a fan that died on my GigaByte 5850 and fried a component B200 it is located as the second component near the right top of the fan connector.
I'm asking here because it looks like you guys are the only ones with a chance of knowing what I'm talking about.
I'm competent with an iron used to rework smt a long time ago. I can replace the component if I can find out what it is. I know it's a long shot but I will not be able to afford another graphics card like this for some time.
Anybody have any idea what this component is?

Monroe
post #2 of 5
can you give me a picture? has the component B200 been knocked off or is it fried?

Can you please explain what has happened in greater detail?
post #3 of 5
Thread Starter 
Thank You for responding!
Well, The fan closest the slot plate on my 5850 went out. I took it out and tried to revive it with a drop of WD-40 on the bearing and put it back in. I tried to get the fan to come back but it refused.
I took and old CPU fan from an AMD processor and trimmed the corners of it in my bandsaw and it fit real nice in the round hole on the 5850 where the old fan was located.
I desoldered the wires to the old fan and soldered them to the new one (very short wires but was able to do it) I put the board back in the pc and the fan worked great! (The volts and current matched the old one from the sticker on the fans (12v .25ma)
The fan was loose for the test so I took the card back out and epoxied the fan to the mount for the old fan. I peeled the sticker off so the epoxy would stick.
I reinstalled the card but to my dismay the fan did not work!
I removed the board and found out that the epoxy had gotten on the bearing! frown.gif so I peeled out the fan scraped off the epoxy and reinstalled the fan to see if that fixed it and SIZZLE and I saw a flash on the card. frown.gif
I yanked the power cord to the PC (about a one second delay dew to the shock I was in) lol.

The board looks ok except for the one component B200 that's obviously fried. I know there could be other discreet components fried. But at least they have part numbers on them lol.
The component is located right by the fan connector O'' The O being the connector and the component being the second apostrophe. The first apostrophe is cap C209.

I have not tried the board to see if there is or is not a display due to the short. And I believe it was a short dew to the wires I soldered to the fan shorting. I had too much isolator striped back on the wires I believe that did it. I moved it around too much cleaning the epoxy off with the short wires I had.
post #4 of 5
B200 is not a part number, it is only a locator

http://www.techpowerup.com/reviews/HIS/HD_5850/images/front_full.jpg

it looks like a resistor from the pic.
snickers
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post #5 of 5
Thread Starter 
I'm trying to upload a pic. I'm on my backup Linux box right now and having a bit of trouble getting the files on that machine from my camera. I don't think there is that much difference but my board layout is totally different being a Gigabyte HD 5850. The component that looks most likely the same on your board is marked MB200 and it's not even there on that board? So I'll try and post the pic's as soon as I can.
The conformal coating (blue on my board) is still intact around the fried part it looks like it didn't damage the board it self much.
M200 could be a resistor I suppose if you go over 999 them you could use M rather than R. Just looks odd to me. The component is still in place on the board it just looks like a burnt black bead. If it is a resistor I need to figure out what value it is!
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