Personal computing discussed
Moderators: renee, Flying Fox, Thresher
Captain Ned wrote:Looks like a trace on the underside of the mobo arced to to the case. Pull the mobo and look at the back side.
JustAnEngineer wrote:If you connected the 4-pin floppy power connector from your power supply to the 4-pin PWM chassis fan controller on your motherboard, you probably fried the fan speed controller chip. For some builds, this may be a non-essential component.
just brew it! wrote:My guess is that you fried a PCB trace on the underside of the motherboard, and (possibly) also the circuit driving that fan header. If everything else still appears to work, then the rest of the mobo is probably unharmed.
If the blown trace is on the underside (outer layer of the PCB) you might be able to resurrect the fan header by soldering a piece of wire to bridge the blown trace, but you've probably got about 50/50 odds that one of the MOSFETs (the little rectangles with 3 terminals) near that burn mark is fried as well.
Edit: Do you recall how the connector was put on the fan header?
just brew it! wrote:Floppy connectors have 4 wires, that fan connector has 3. Where was the extra pin of the Molex - above the fan connector or below it? (If you remember...)
just brew it! wrote:Edit: I really wish they would key the connectors such that this kind of mistake is impossible.
Murderbydeath wrote:If I'm reading the pinouts correctly, ground was going into ground, ground into +12V, and +12V into tachometric signal (I'm guessing the RPM signal), if that helps.
NovusBogus wrote:They all support USB.I miss having an A:\ drive and emorage a little bit every time I see a motherboard that won't support a floppy.
Murderbydeath wrote:Most knowledgeable people I've encountered about this issue (I've posted in like 6 different places).
vargis14 wrote:You do have the brass standoff's on the motherboard tray?? I ask this because the motherboard looks like it is laying right on the motherboard tray in the photo. That could make bad things happen if the motherboard is just screwed to the tray with no standoffs to electrically insulate the back of the board.
vargis14 wrote:You do have the brass standoff's on the motherboard tray?? I ask this because the motherboard looks like it is laying right on the motherboard tray in the photo. That could make bad things happen if the motherboard is just screwed to the tray with no standoffs to electrically insulate the back of the board.
just brew it! wrote:Couldn't tell much from the pics, too blurry. Sorry.