need help, southbride issue.

B

bmx6454

New Member
i know my way around circuits, but im not expert, not even close lol. i have done 2 days worth of research just to figure out what info i have. (srry 4 the sh%tty pics. i had to use my fone bc my camera is broke.)this is a pic of the southbridge:

xc0x7m.jpg


the burnt chip is in the red circle. after as much info as i could find, im pretty sure that its a 1.6a fuse (plz plz plz correct me if im wrong lol.) im pretty sure it looked like this:

15i97d2.jpg

has a symbol thats almost like an x, and says 16. now more or less, im wondering why my computer(atleast i believe) was still functioning fine. not really fine, the hdd crashed alot, even though it passed all tests(and tried other hdds with same resuls), and i couldnt get dvd, cd drives to work 95% of the time. and after trying three known working drives, i tore down the comp, and discovered the burnt fuse. but why was it still working? i mean i would imagine this would cause higher failure?? but regardless, what could have cause this? and above all, how can i fix it? im have been at this for days...... and even if u have very little info id still be grateful.

board is m077 southbridge set is ati.


one other VERY curious question if any1 wants to shed light on. in the first picture i have circled in black two ready spots to insert 2 more sata ports.
bottom side, open ones circled:
24dirfn.jpg

my eysight i terrible, but i think that there is only 4 connections to each port. r these usable?? (i do have that supplys, tools, and ability to insert ports btw). not nearly as important as the first question, but still very curious if i could uilize these. and if they werent usable, why run the lines at all?? w.e. thanks in advance.
 
Would help to know what motherboard you have. Especially if it came out of an OEM case. Burnt out hardware on motherboard cause different issues. I've seen bulging and leaking capacitors cause many different failures.
 
it is from an oem. presario sr1000. and i did list the boar. but idk if u didnt see it? or u if u need the full thing. full is:m9b0wn 1.03-e02 hp p/n 5188-4364

c63s008-02045.

not sure if all these r relevent
 
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With it being an OEM board, they were omitted for a reason. Frankly, I wouldn't go messing with anything on that board. A bad electronic component probably made something else go bad and tracking it down would be a nightmare. Besides, its a very old system.
 
yea, but a: this computer has a relevant purpose that i do not want to waste, and B: i enjoy challenging repairs. but u said by a new mobo, i have a MUCH better comp than this one. but this one is needed, like i said. but either way, whats the worst that could happen?? i repair it, nd something happens? not worried. i can spare the wasted parts, nd i have a fire extinguisher lol. whether or not u would fix it in that situation, im just hoping that someone can tell me for sure what that part is please.

nd just to add, there is only the number "f6" next to it.
 
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Stranglehold would be able to tell you most likely. I'll direct him here but not sure when he will show up.
 
cool. thanks man. i really appreciate it. but could it be a fuse? like if u had to guess? cause i though it was a 1.8a fuse, but rethinking that.

1.6a i meant*
 
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Not sure, Getting a better pic of it would definately help Stranglehold when he does show up. I've already private messaged him to come here when he gets online.
 
cool. i should be able to get a better pic. someone told me that u can get the mobo schematics from the manufacturer if u contact them?
 
Does this look like your board?
http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?sp4ts.oid=402657&spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c00496280-14%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken#N101EE

But yeah a closer and better focused photo would help tell what kind of transistor is it. Could not find anything on X16.

Those are a place for two extra SATA ports. Think they have 7 contacts with 2 more that holds the ports in place. As far as installing 2 more ports, sure but, don't know if they are included into the circuitry on the board.
 
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yea thats my mobo. i did more seachin, nd i believe its a 1.6a slow burn fuse, and the strange "X" symbol is is from "AVX". hope atleast a word of this is right, cause id be pissed if after 2 hours of research haha.

24lra50.jpg


but thats not the actually spot. the spot of the identical burnt one is:

28hcwmu.jpg


on the subject of the s-ata thing, it actually does have all the necessary lines from the controller chip to the open spots. it shows in my pic in my original post. and in bios, it list 2 floppy drives available, it list 4 spots available for ide devices, and it lists 4 spots for sata..... very interested right now....

actually, looked at it more, and checked sata pinout right quick, nd it does have all the line needed, and the go directly into the chip......
 
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It might. What ever was there was for a reason. And if it was a fuse and it burned, putting a bigger fuse in may burn something else further down the line.
 
i found the source of the cause of thje short, but thats not a perfect gaurantee it sucks cause i cant find any surface mount slow burn 1.6a....closest i got is 1.5a. and above that is 20a. ima take my chances, little experiment i guess. im also adding in two sata inputs in the empty spots. ill let yall know how it goes after im done if ya want?
 
On HPs site, the board looks like it has a greenish thing on it that says "P 160".

It looks to be between a USB header and an 8-pin black ic of some sort but the traces are hard to follow in the pictures I have of the board.
 
damn... so this is pretty much a gamble without schematics or part numbers... now i have another mobo that has an identical looking chip in the same spot. only difference is it say 15 not 16. above it it says 1.5 amps. part # rt9f1. nd this 1 is on an intel board, but the model number is gone. im hoping this info could help identify the part. i have a few other boards with similar parts. they all say "f" and a number next to them. if its a fuse, i know how to fix it. but it seems to be mission impossible on confirmation haha
 
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