Old gigabyte board dosent post (keyboard controller chip problem)

[mariushm]

Yes, it's a resettable fuse - it "recovers" after power is disconnected and given a bit of time ... see : https://www.digikey.com/products/en/circuit-protection/ptc-resettable-fuses/150

 

[giuspepy]

Just now, Najila42 said:

I can't read what it says, but it may be given the information posted by mariushm

Theres an f under it and the number.  With the multimeter ive seen that current goes thru.  Is this a good thing or bad? 

[Guest]

Some fuses look like this too.

Gotta have an F nearby.

 

[Najila42]

Just now, giuspepy said:

Theres an f under it and the number.  With the multimeter ive seen that current goes thru.  Is this a good thing or bad? 

If there's continuity through the fuse that means it's good.

[giuspepy]

2 minutes ago, mariushm said:

Yes, it's a resettable fuse - it "recovers" after power is disconnected and given a bit of time ... see : https://www.digikey.com/products/en/circuit-protection/ptc-resettable-fuses/150

 

Ok then its still a good fuse i think

 

[giuspepy]

2 minutes ago, mariushm said:

Yes, it's a resettable fuse - it "recovers" after power is disconnected and given a bit of time ... see : https://www.digikey.com/products/en/circuit-protection/ptc-resettable-fuses/150

 

I cant really get what else to do.  I cant seem to find other fuses

[Guest]

Just now, giuspepy said:

I cant really get what else to do.  I cant seem to find other fuses

Scroll up a few posts

[giuspepy]

2 minutes ago, ShrimpBrime said:

Scroll up a few posts

Yeah ive seen it.  Its basically all diodes lol. 

[giuspepy]

6 minutes ago, ShrimpBrime said:

Some fuses look like this too.

Gotta have an F nearby.

 

I cant find any. 

[giuspepy]

Just now, giuspepy said:

I cant find any. 

Ive finded something wich starts with f.  But its "fb" and then the number

[Guest]

2 minutes ago, giuspepy said:

Yeah ive seen it.  Its basically all diodes lol. 

The one's Iv'e circled are probably mainboard fuses.

 

[giuspepy]

Just now, ShrimpBrime said:

The one's Iv'e circled are probably mainboard fuses.

 

 

[giuspepy]

1 minute ago, ShrimpBrime said:

The one's Iv'e circled are probably mainboard fuses.

 

Lemme test those

[Guest]

Yea bro right there. Inside the circle. That's a pack of fuses.

 

[giuspepy]

1 minute ago, ShrimpBrime said:

Yea bro right there. Inside the circle. That's a pack of fuses.

 

The more large one as no current passthrough

[giuspepy]

Just now, giuspepy said:

The more large one as no current passthrough

The others of the same tipe seem act the same.  So i doubt its a fuse

[Guest]

Just now, giuspepy said:

The more large one as no current passthrough

Then the issue becomes..... what amp rating is it???

 

So, for testing, you can solder a wire (small/tiny) across the leads for testing. 

[Guest]

1 minute ago, giuspepy said:

The others of the same tipe seem act the same.  So i doubt its a fuse

You ninja'ed me, no the large one may not be a fuse then.

I didn't mean to actually circle that one. Just kinda worked out that way

[giuspepy]

5 minutes ago, ShrimpBrime said:

Then the issue becomes..... what amp rating is it???

 

So, for testing, you can solder a wire (small/tiny) across the leads for testing. 

I dont actually know what amperage is lol.  I never been able to learn it properly.  So what should i do?  Solder the wire and then? 

[giuspepy]

6 minutes ago, ShrimpBrime said:

You ninja'ed me, no the large one may not be a fuse then.

I didn't mean to actually circle that one. Just kinda worked out that way

Oh rip lol

[mariushm]

No, STOP.

I'll edit this message to add more  but you guys are posting too fast

 

The light brown / cream are capacitors. If you try to measure continuity with a multimeter it will show as open, because that's how capacitors function.

 

When there's no room to put text near a component, often the markings for that component or for a group of components is somewhere else in a rectangle. In the picture, the text for the parts above is in that rectangle to the right of the connector. So, that row of blacker parts is FB39, FB 37 and so on, and the capacitor you circled is probably C87 (what's above C88, C89 etc in that rectangle)

 

Those blacker parts could be fuses or they could be ESD diodes (protections diodes in case you zap the port with static electricity).

 

 

FB could also mean feedback in some context, as in resistor or capacitor used in a feedback circuit. Unlikely to be this in this particular case.

[Guest]

Just now, mariushm said:

No, STOP.

I'll edit this message to add more  but you guys are posting too fast

 

 

[giuspepy]

1 minute ago, ShrimpBrime said:

 

Im diying lol

[Guest]

Just now, giuspepy said:

Im diying lol

I already know we are reaching for a fix for this board. lol

 

 

[mariushm]

ok, i finished editing my post.. read and continue ...