fixing bad MBGA(mini Ball Grid Array) solder connection?

acem77

acem77

Angel's Love Slave
20 Year Member
Joined
Apr 11, 2003
Posts
914
I have a random lock up/pausing problem in my Hewlett-Packard Pavilion dv4000 caused by a bad solder connection in the mBGA(mini Ball Grid Array) that connects the
fw82801fbm chip(Mobile Intel® 915GM).

It seem this line of laptop has a known problems with random pausing/lock ups.
when flexing the laptop in the front right corner it will cause it to lock up/pause and unlock/unpause. this does not crash the system. it will continue just as normal.
grr i always find the lemons:P

i finally took mine apart and looked by the side you need to stress to cause the effect. the suspect chip was the fw82801fbm chip(Mobile Intel® 915GM).
after putting random pressure on the chip i was able to cause the system lock up.

its seems i need to resolder the connections under the Mobile Intel® 915GM chip.
this will be no easy task because of it using a mBGA to solder it to the system board.
i know there are Infrared SMD and BGA Desoldering Rework Stations that are used for cases like this.

has anyone here used some other solution to do such a repair with more common tools?
maybe someone here has access to the tools could try the repair for some extra cash?
 
Xian Xi

Xian Xi

JammaNationX,
15 Year Member
Joined
Dec 1, 2005
Posts
27,762
You sure its not the pins on the chip or maybe something on the other side of the board?
 
acem77

acem77

Angel's Love Slave
20 Year Member
Joined
Apr 11, 2003
Posts
914
Xian Xi said:
You sure its not the pins on the chip or maybe something on the other side of the board?
Click to expand...

yeap i wish :(
 
channelmaniac

channelmaniac

Mr Neo Fix-it
15 Year Member
Joined
Nov 29, 2005
Posts
4,316
Xian Xi said:
You sure its not the pins on the chip or maybe something on the other side of the board?
Click to expand...

That's just it... there are NO pins on the chip. It floats on little balls of solder.

My solder station has the capability to rework it but I don't have the BGA type soldering irons for it. Besides, you have to have special tools to reball the chip too.

You'd be better off just buying a used board for it unless you can get the Sega repair guy to do it. His website says he can do BGA.

RJ
 
taitai

taitai

Genbu's Turtle Keeper
Joined
Apr 25, 2004
Posts
2,393
acem77 said:
I have a random lock up/pausing problem in my Hewlett-Packard Pavilion dv4000 caused by a bad solder connection in the mBGA(mini Ball Grid Array) that connects the
fw82801fbm chip(Mobile Intel® 915GM).

It seem this line of laptop has a known problems with random pausing/lock ups.
when flexing the laptop in the front right corner it will cause it to lock up/pause and unlock/unpause. this does not crash the system. it will continue just as normal.
grr i always find the lemons:P

i finally took mine apart and looked by the side you need to stress to cause the effect. the suspect chip was the fw82801fbm chip(Mobile Intel® 915GM).
after putting random pressure on the chip i was able to cause the system lock up.

its seems i need to resolder the connections under the Mobile Intel® 915GM chip.
this will be no easy task because of it using a mBGA to solder it to the system board.
i know there are Infrared SMD and BGA Desoldering Rework Stations that are used for cases like this.

has anyone here used some other solution to do such a repair with more common tools?
maybe someone here has access to the tools could try the repair for some extra cash?
Click to expand...

Warranty repair.
 
acem77

acem77

Angel's Love Slave
20 Year Member
Joined
Apr 11, 2003
Posts
914
channelmaniac said:
That's just it... there are NO pins on the chip. It floats on little balls of solder.

My solder station has the capability to rework it but I don't have the BGA type soldering irons for it. Besides, you have to have special tools to reball the chip too.

You'd be better off just buying a used board for it unless you can get the Sega repair guy to do it. His website says he can do BGA.

RJ
Click to expand...

i fig since its a flaw of the original boards a new replacement would suffer the same symptoms eventually and be a lost cuz. if i could get the chip reworked it would have a better chance of being a permanent fix.
can you please give me the info of this sega guy?
i have a one chance to fix it locally my friend work at Philips and has access to some if not all the needed tools.

i have no warranty. even if i did they would just put a new system board with the same flaw, most people that had it fixed under warranty have had to keep sending it back over time.
 
You must log in or register to reply here.
Top