DAUT3MB28C0 missing components on battery power circuits

[magnetepazzo]

Hi friends , I have received from a customer this pavilion dv5 with this mb DAUT3MB28C0, the problem is short in power and missing component near battery connector I think a capacitor and a diode, it's possible to say wath is pc120 and c654 ? thanks

[SMDFlea]

Re: DAUT3MB28C0 missing components on battery power circuits

You need the schematic.What revision number is the board .

DAUT3MB28C0 Rev:

[magnetepazzo]

Re: DAUT3MB28C0 missing components on battery power circuits

You need the schematic.What revision number is the board .

DAUT3MB28C0 Rev:

REV C
Thanks

[SMDFlea]

Re: DAUT3MB28C0 missing components on battery power circuits

Rev C is the ATI graphics version. Does it have DDR2 or DDR3 . There isn`t a free schematic for the ddr3 version , http://**************/load/noutbuki/.../307-1-0-29432 .For the DDR2 version schematic there isn`t an ATI version,only Nvidia, so there will be differences but you can use it for reference .

[BlueMidnight]

Re: DAUT3MB28C0 missing components on battery power circuits

It's important to note that the one component is actually marked PC128 and not PC120. It's a 10uF 25V capacitor.

I'm not sure if the schematic available for purchase is any different or if they are all pre-production versions that don't show C654. There are also boardviews available, and they may or may not show C654. Any revision that shows it should be fine, as that circuit is pretty much the same for all of them.

There's a thread on a Polish site where the exact same caps burned up. They ended up using a 2200pF 50V capacitor for C654 simply because that's what PC182 is. But that was just a wild guess. C654 certainly is a lower capacitance part than PC128 though, and is for reducing higher frequency noise on that power rail for either stability or EMI compliance reasons.

[mcplslg123]

Re: DAUT3MB28C0 missing components on battery power circuits

dear friend, if your mobo has ati or nvidea-then its a colossal waste of time as all these mb has problems in graphics chip. So consider this also while investing your time on it.

[magnetepazzo]

Re: DAUT3MB28C0 missing components on battery power circuits

dear friend, if your mobo has ati or nvidea-then its a colossal waste of time as all these mb has problems in graphics chip. So consider this also while investing your time on it.

ATI
Thanks

[tibd]

Re: DAUT3MB28C0 missing components on battery power circuits

More pics with wider view?