Nvidia GPU chip problem - GSM-Forum

frida0231 · 05-06-2009, 00:30

I bought RE7500,,and interested in the experience and sugestions abaut repair Nvidia GPU chipset in laptops??
Your suggestions and repair tips are welcome,,

gbluez · 05-06-2009, 00:52

Hi,
I dont have RE7500, but sometimes i work on pc part.
All computer part now days are fully ROHS compliant. The lead free tin bga is so hard to be reworked.
Try to find some documents about it on google.

mp3team · 05-19-2009, 06:06

Quote:

Originally Posted by frida0231

I bought RE7500,,and interested in the experience and sugestions abaut repair Nvidia GPU chipset in laptops??
Your suggestions and repair tips are welcome,,

hi. I use t870A , buy the re7500 jovy I received this week. . repair laptops. I would like to share my experience. with the nvidia gpu. the
G6150
Annex photos of my work

http://rapidshare.com/files/23463702...6150_.rar.html
.
my English is not very good

greetings from COLOMBIA

paisleypcdoc · 05-20-2009, 02:40

Just finished reflowing the nvidia gpu on an HP DV2500 using the jovy.

Just used the standard Jovy leadfree profile and PLENTY of foil tape protecting the plastic components on both sides of motherboard.

Worked perfectly 1st time.

If a reflow doesnt fix it, remove and reball with lead based solder and re-attach with a lead based solder profile.

If that still doesnt work, the chip is duff. Remember to check whether replacement chip has lead or lead free balls and use appropriate profile.

Obviously, if you dont have equipment to reball, you need to go straight to replacement.

-Michael.

mp3team · 05-26-2009, 05:47

Quote:

Originally Posted by paisleypcdoc

Just finished reflowing the nvidia gpu on an HP DV2500 using the jovy.

Just used the standard Jovy leadfree profile and PLENTY of foil tape protecting the plastic components on both sides of motherboard.

Worked perfectly 1st time.

If a reflow doesnt fix it, remove and reball with lead based solder and re-attach with a lead based solder profile.

If that still doesnt work, the chip is duff. Remember to check whether replacement chip has lead or lead free balls and use appropriate profile.

Obviously, if you dont have equipment to reball, you need to go straight to replacement.

-Michael.

height that you use? , Upper Heater for not leaving the blistering chip.

paullovinicius · 05-26-2009, 18:07

Quote:

Originally Posted by mp3team

hi. I use t870A , buy the re7500 jovy I received this week. . repair laptops. I would like to share my experience. with the nvidia gpu. the
G6150
Annex photos of my work

http://rapidshare.com/files/23463702...6150_.rar.html
.
my English is not very good

greetings from COLOMBIA

please, can you upload it again???
the limit for download was reached.

thanks

Trion · 07-03-2009, 20:22

I reflowed an HP pavilion DV2000 with geforce GO6150 successfully too. Its working fine for around a week now. Have asked customer to use with laptop cooler and not to run it on games for more than 45 mins as the heat transfer system is horrible. Have reflowed another today with a GEforce GO 7200. Shall be putting it together and testing it tomorrow. Another great use for RE-7500! This is one moeny making machine.

For those who are interested, i used the upper heater at lowest position. And its not just profiles. You have to keep an eye on the board. Sometimes manual control is best when it cmoes to reflow.

Trion · 07-05-2009, 17:59

The second laptop too is working well. Am doing some cooling mods to keep the chips cool as HP has made a very bad cooling design using a thermal pad to transfer heat from the chip to the heatsink. The chip should have been in direct contact with the heatsink. Thermal pads are ok for RAM ICs and northbridge chipset ICs provided they're not GPUs.

pentu · 07-25-2009, 14:53

Quote:

Originally Posted by mp3team

hi. I use t870A , buy the re7500 jovy I received this week. . repair laptops. I would like to share my experience. with the nvidia gpu. the
G6150
Annex photos of my work

http://rapidshare.com/files/23463702...6150_.rar.html
.
my English is not very good

greetings from COLOMBIA

Hi,
Can you upload your photos again
Thanks

pentu · 07-25-2009, 14:56

Quote:

Originally Posted by Trion

I reflowed an HP pavilion DV2000 with geforce GO6150 successfully too. Its working fine for around a week now. Have asked customer to use with laptop cooler and not to run it on games for more than 45 mins as the heat transfer system is horrible. Have reflowed another today with a GEforce GO 7200. Shall be putting it together and testing it tomorrow. Another great use for RE-7500! This is one moeny making machine.

For those who are interested, i used the upper heater at lowest position. And its not just profiles. You have to keep an eye on the board. Sometimes manual control is best when it cmoes to reflow.

Hi Trion,

I have ordered Jovy RE-7500, can you share your experience of using jovy RE-7500, it will be great for future users.
Thanks

uncleseb · 07-27-2009, 20:04

Quote:

Originally Posted by pentu

Hi,
Can you upload your photos again
Thanks

I am interessed ( i buy it very soon), can you upload again please
many thanks

mp3team · 07-30-2009, 07:12

Quote:

Originally Posted by uncleseb

I am interessed ( i buy it very soon), can you upload again please
many thanks

ok
http://rapidshare.com/files/26164392...g6150.rar.html

pic remove g6150 t-870a

http://rapidshare.com/files/26164319...g6150.rar.html

thanks

Trion · 07-30-2009, 18:10

Hi
I have now fixed 5 laptops successfully so far. The models are: HP DV2000, Dv6000, and COMPAQ V 3000. besides the reflow, you MUST remove the thermal pad that is in between the GPU and heatsink and replace it with a 2mm thick copper piece approx measuring 7x8mm. These laptops all fail because of the thermal pad not being able to efficiently transfer heat to the heatsink. So just reflowing the GPU isn't enough. Also use arctic silver thermal paste on the GPU, then place the copper piece on it, again put a little more paste and finally fit the heatsink on this. This way you will have a 100% successful repair that will last for a long time. Use this utility to check GPu temp: GPU-Z. get it here: http://www.techpowerup.com/gpuz/

if your GPU is runnning normally at around 60 degrees or less, that's ok. And when running games it shouldn't be more than 75-80 degrees. If your GPU crosses these temperatures, you can be sure the cooling is faulty and needs modification. Check the temp even on working laptops in the DV2000, 6000 and 9000 series and compaq V 3000 series.

I had one laptop whose GPU temp would shoot upto 90 degrees in a few minutes. After the cooling mod it starts at around 49-50 degrees compared to 85.

While reflowing the GPU, i use the default Jovy Lead free reflow profile for the NVIDIA GPU. Do make sure you bend the temperature probe tip as recommended by JOVY to get correct temp readings while reflowing. The upper heater is to be kept at the lowest height for this reflow and reflow of most large BGA ICs. In case your machine isn't following the profile, either heater height is wrong or temp probe isn't making proper contact. Once the reflow is done cool the board and do the cooling modification with copper pieces and put back the laptop. And your laptop should work. If not you may need to reflow again as i had to in one case. The reason for this was i hadn't used flux the first time. I generally run the machine for a few minutes on preheat and place the board onto it and start the profile from a temp of around 45-50 degrees.

I use AMTECH flux.

I have given you the info you need to be successful in repairing all the laptops with this kind of problem.

Good luck in your repairs!

linears4 · 08-07-2009, 15:42

i repaired several hp dv series, but no way to fix it permanently with a normal reflow, they fall after a couple of months,

i think that in these hp model they don't use normal unleaded balls, but some kind of high temperature alloy, cause removing is very very hard.

jovy 7500 has no sufficient preheating area for these boards and a proper reflow will never happen, you can test during the work if the reflow is well done by trying to move the chip during reflow with a small tweezer, if touching it very gentle you can see the chip moving then the reflow is doing properly, if you feel the chip steady on the board during the reflow process, no real reflow has happen, and no long term repair will succed.

the reason why the board work after this kind of work is that the balls make good contact cause thermal dilatation, but after a medium time it will stop working again.

for a permanent fix , reballing with leaded ball 63/37 is necessary, and then you can do the modification with a copper shim to prevent failure in the future.

Trion · 09-01-2009, 20:35

I agree with linears4 about a reballing with lead based solder being the better solution. And its true that just a reflow might not be sufficient.

05-06-2009, 00:30	#1 (permalink)
frida0231 Junior Member Join Date: May 2008 Location: Gothenburg Sweden Posts: 5 Member: 767194 Status: Offline Thanks Meter: 1	Nvidia GPU chip problem I bought RE7500,,and interested in the experience and sugestions abaut repair Nvidia GPU chipset in laptops?? Your suggestions and repair tips are welcome,,

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05-06-2009, 00:52	#2 (permalink)
gbluez No Life Poster Join Date: Jul 2004 Posts: 11,049 Member: 73565 Status: Offline Thanks Meter: 5,062	Hi, I dont have RE7500, but sometimes i work on pc part. All computer part now days are fully ROHS compliant. The lead free tin bga is so hard to be reworked. Try to find some documents about it on google.

05-20-2009, 02:40	#4 (permalink)
paisleypcdoc Junior Member Join Date: May 2009 Posts: 2 Member: 1031113 Status: Offline Thanks Meter: 0	Just finished reflowing the nvidia gpu on an HP DV2500 using the jovy. Just used the standard Jovy leadfree profile and PLENTY of foil tape protecting the plastic components on both sides of motherboard. Worked perfectly 1st time. If a reflow doesnt fix it, remove and reball with lead based solder and re-attach with a lead based solder profile. If that still doesnt work, the chip is duff. Remember to check whether replacement chip has lead or lead free balls and use appropriate profile. Obviously, if you dont have equipment to reball, you need to go straight to replacement. -Michael.

07-03-2009, 20:22	#7 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	I reflowed an HP pavilion DV2000 with geforce GO6150 successfully too. Its working fine for around a week now. Have asked customer to use with laptop cooler and not to run it on games for more than 45 mins as the heat transfer system is horrible. Have reflowed another today with a GEforce GO 7200. Shall be putting it together and testing it tomorrow. Another great use for RE-7500! This is one moeny making machine. For those who are interested, i used the upper heater at lowest position. And its not just profiles. You have to keep an eye on the board. Sometimes manual control is best when it cmoes to reflow.

07-05-2009, 17:59	#8 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	The second laptop too is working well. Am doing some cooling mods to keep the chips cool as HP has made a very bad cooling design using a thermal pad to transfer heat from the chip to the heatsink. The chip should have been in direct contact with the heatsink. Thermal pads are ok for RAM ICs and northbridge chipset ICs provided they're not GPUs.

07-30-2009, 18:10	#13 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	Hi I have now fixed 5 laptops successfully so far. The models are: HP DV2000, Dv6000, and COMPAQ V 3000. besides the reflow, you MUST remove the thermal pad that is in between the GPU and heatsink and replace it with a 2mm thick copper piece approx measuring 7x8mm. These laptops all fail because of the thermal pad not being able to efficiently transfer heat to the heatsink. So just reflowing the GPU isn't enough. Also use arctic silver thermal paste on the GPU, then place the copper piece on it, again put a little more paste and finally fit the heatsink on this. This way you will have a 100% successful repair that will last for a long time. Use this utility to check GPu temp: GPU-Z. get it here: http://www.techpowerup.com/gpuz/ if your GPU is runnning normally at around 60 degrees or less, that's ok. And when running games it shouldn't be more than 75-80 degrees. If your GPU crosses these temperatures, you can be sure the cooling is faulty and needs modification. Check the temp even on working laptops in the DV2000, 6000 and 9000 series and compaq V 3000 series. I had one laptop whose GPU temp would shoot upto 90 degrees in a few minutes. After the cooling mod it starts at around 49-50 degrees compared to 85. While reflowing the GPU, i use the default Jovy Lead free reflow profile for the NVIDIA GPU. Do make sure you bend the temperature probe tip as recommended by JOVY to get correct temp readings while reflowing. The upper heater is to be kept at the lowest height for this reflow and reflow of most large BGA ICs. In case your machine isn't following the profile, either heater height is wrong or temp probe isn't making proper contact. Once the reflow is done cool the board and do the cooling modification with copper pieces and put back the laptop. And your laptop should work. If not you may need to reflow again as i had to in one case. The reason for this was i hadn't used flux the first time. I generally run the machine for a few minutes on preheat and place the board onto it and start the profile from a temp of around 45-50 degrees. I use AMTECH flux. I have given you the info you need to be successful in repairing all the laptops with this kind of problem. Good luck in your repairs!

08-07-2009, 15:42	#14 (permalink)
linears4 Junior Member Join Date: Mar 2005 Age: 52 Posts: 32 Member: 132074 Status: Offline Thanks Meter: 13	i repaired several hp dv series, but no way to fix it permanently with a normal reflow, they fall after a couple of months, i think that in these hp model they don't use normal unleaded balls, but some kind of high temperature alloy, cause removing is very very hard. jovy 7500 has no sufficient preheating area for these boards and a proper reflow will never happen, you can test during the work if the reflow is well done by trying to move the chip during reflow with a small tweezer, if touching it very gentle you can see the chip moving then the reflow is doing properly, if you feel the chip steady on the board during the reflow process, no real reflow has happen, and no long term repair will succed. the reason why the board work after this kind of work is that the balls make good contact cause thermal dilatation, but after a medium time it will stop working again. for a permanent fix , reballing with leaded ball 63/37 is necessary, and then you can do the modification with a copper shim to prevent failure in the future.

09-01-2009, 20:35	#15 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	I agree with linears4 about a reballing with lead based solder being the better solution. And its true that just a reflow might not be sufficient.