Laptop Motherboard Repair

[markopolo]

Re: Laptop Motherboard Repair

the most telling way i can think of right now is a port80 card. (they come in miniPCI too.)

Well here is the utube link of step by step repair:

https://www.youtube.com/watch?v=goFnhMDlP8I

[ortiko]

Re: Laptop Motherboard Repair

DV6000 No Power - Blue DC Block lights..

Low ohms

181 ohms - 7636 (By 8724)

51 ohms - 7636 (by ENE)

274 ohms - 6679 (opposite side of CPU socket)


Replace all? This version of the board uses an intersil SMPS controller. How would I test it? ISL6236

I now this is old thread but i have same problem and would like to know how to solve it ?

[blessedsan]

Re: Laptop Motherboard Repair

I had repair my motherboard at www.buymotherboard.net, they are professional laptop motherboard dealer.

[vinhcao]

Re: Laptop Motherboard Repair

I email to them, but noreply,
Hic Hic

[vinhcao]

Re: Laptop Motherboard Repair

Well the logo is Fairchild so maybe contact them, that part number doesn't show up anywhere

Thank many, I try to contact them

[Agent24]

Re: Laptop Motherboard Repair

Well the logo is Fairchild so maybe contact them, that part number doesn't show up anywhere

[vinhcao]

Re: Laptop Motherboard Repair

I cut that pic for you,is it clear? If not, I'll retake
Thanks many

[vinhcao]

Re: Laptop Motherboard Repair

Let I take a bester picture then post soon

[Agent24]

Re: Laptop Motherboard Repair

The circled chip has 14 pins, not 8.
Do you have a bigger\better photo showing the actual number?

[vinhcao]

Re: Laptop Motherboard Repair

I removed the first burnt 8 pin mosfet. I can't read what type it is, but the top of it says ph7sd.

Hi,

I have a zeppelin speaker, It have problme with chip PH7SD. Can you tell me how to find out whre to buy this chip



[url=http://www.uphinh.vn/image/stream/1374874.jpg]

Thanks

[senchire]

Re: Laptop Motherboard Repair

Used T8280 for quite some time and its fantastic (C100 mod included). Don't know how you had bad exp with them.

[thesloc]

Re: Laptop Motherboard Repair

The Puhuit stations are horrible. Their IR beams pulsate therefore don't provide a stable beam at all.

I'd steer away and try to get a jovvy system instead.

[sasser]

Re: Laptop Motherboard Repair

At least u need some machine like ir6500. This enough then u upgrade to elstien heater

[senchire]

Re: Laptop Motherboard Repair

If you plan on doing laptop, ps or xbox reflow/reball with T862 its a bad idea.
Low power, small heater and bad quality all in one (i would say). You will have a lot popcorned chips and wraped boards, you are new to the scene (i guess maybe wrong) a good IR preheater and a hotair wand is the perfect if you don't wanna spend a lot of money.

[Agent24]

Re: Laptop Motherboard Repair

I don't know for sure but I don't think the IR lamp has a wide enough beam on those models to properly heat up large BGAs that are usually found on motherboards.

I think those ones are designed more for phones and other similar devices where the chips are quite small.

I may be wrong but that was the impression I got from what I've seen online, eg: The demo videos and photos always show that model station used to repair phones.

[sparker1]

Re: Laptop Motherboard Repair

Since everybody bags out reflows I was thinking of a reball kit including an IR station. There's this one in my price range. What do you think of it?
http://www.aliexpress.com/item/New-T...466034161.html
and also this one (previous model I think)
http://www.aliexpress.com/item/The-B...320954931.html
I saw a post here that said this one wasn't good for laptops but didn't say why.

[trebo]

Re: Laptop Motherboard Repair

Guys any tips or trick howto know that bga is shorted when solder underneath is cold solder bad join or uncut together? Most cases gpu or southbridge is problem.

I set up the m/b on a table, screen connected
press down on the chip and the opposite side of board hard, so that it is sandwiched between my fingers
have someone turn it on long enough for screen to come on, if screen does not come on then it must be turned off, then turned straight back on
keep repeating this process about 6 times while chip is pressed from both sides of board hard and continually (sometimes it works first time)
the screen at some point will come on if it is the offending chip, (on most occasions)
care must be taken to ensure that you do not short m/board out, tape and cardboard help to prevent this for me.

also a hair dryer aimed at the underside area of the chip from the other side of the m/b, with someone else turning m/b on and off, the same as the first method
this option works well in bringing the screen on, It tells you there is a dry joint etc, but heat travels so you cant be 100% sure its the chip you are working on
that's one is for you to make up your own mind on
hope it helps

[severach]

Re: Laptop Motherboard Repair

Shorted chips usually heat up when current is supplied to the short. Heat sinks make the heat hard to find. Some good chips will overheat if they are powered by only some of their voltages.

[sasser]

Re: Laptop Motherboard Repair

Guys any tips or trick howto know that bga is shorted when solder underneath is cold solder bad join or uncut together? Most cases gpu or southbridge is problem.

[yadab100]

Re: Laptop Motherboard Repair

Dear Friends,
My toshiba laptop problem is 3,5 volt always is ok, core plus every power is ok, clock also good(means same with diagram), but power on , fan run, cpu heating, , but not displaying, after that copy bios software but same status, What can I do ? I think BGA Chip & Controller is bad but how can we fix is this bga problem & others.....