How to solve overheating issue?

[lezsimply]

What can you say about the design of this laptop? Its a NEO Basic B3230 netbook. As you can see on the picture below, the heatsink does not have any connection between the fan. How can it pull hot air out of the case if its not joined or something... The main problem is this netbook turns off because it gets really hot. Temperature rises fast, hitting 90c in just 10 mins or less.

I already cleaned and replace thermal pads. And also tried using thermal paste instead of pads. Do you guys have any suggestions to make this a little more cooler? The only option I could think of is to add copper shim on top of the aluminum heatsink. Hope someone could help out. Thanks!

[domas]

Re: How to solve overheating issue?

no, seriously, WTF?

I have some fan+heatsinks sets laying around, try swapping the fan to a smaller so there is space between its output for air flow and plastic side and try fitting some heatsink radiator there with copper shims going to the current sink. Quite some fabrication needed

[lezsimply]

Re: How to solve overheating issue?

Good suggestion domas. But I noticed that the fan is not spinning no matter how long I wait. I already tried a different fan but still won't spin. I got 3.3v on the yellow wire (sensor?) but zero voltage on the red one. The red wire should at least have 5v right?

Do you guys have any schematic for this one? NEO Basic B3230. there's a label on the board that says 6-71-m81p0-d03a gp I can't find any other morkings to identify the board. Thanks again

[dj_ricoh]

Re: How to solve overheating issue?

red wire its 5v supply
yellow one its like this
it depends
i had a xps dell that the red was miss and we took from usb, but we did not know that the yellow 3.3v =100% spin
so 1.3-.1.6v=20-35% spin and 3.3v 100%(its like gate control)
the red wire is main v supply so it needs to be there; take it from usb jsut find a 5v rail and test and see if the yellow wire drops on voltage cuz you know the sensore is giving it a go because its super hot.

[lezsimply]

Re: How to solve overheating issue?

I try this ricoh. Do I still need to connect the yellow wire on the connector and solder red wire on usb? or just connect the black and red one? Thanks again

[lezsimply]

Re: How to solve overheating issue?

Just found out that the stock fan I'm using is busted. And the 5v connector for the fan is also out. I managed to use a usb port all the way from the left side of the laptop and successfully makes other fan spin, except for the stock fan.

Even if I acquire a replacement fan it would not still solve the overheating issue. I wonder how this laptop survived for almost 5 years without the processor or the graphics chip getting busted because of the design. The only reason this laptop had this problem because it was not used for about 3 weeks.

I just taught of adding copper on top of the aluminum sink, but I can't still make a connection from the fan to the heatsink (circled in yellow) . I think its impossible...

By the way what is the best adhesive agent that can join aluminum and copper together. Ordinary bonds can't handle extreme heat. Thanks again.

[jtamad44]

Re: How to solve overheating issue?

yeah, thats a good idea, put 5 or 6pcs thick copper shim pad, just use thermal paste and adhesive foil so it won't fall. if its still overheatin, change bga chip with a new one, for best result.

[domas]

Re: How to solve overheating issue?

are there any metal radiator fins on the output of the fan where it blows out the hot air?

[lezsimply]

Re: How to solve overheating issue?

Good day. @domas, There aren't any fins on the output, its just a fan with no other holes except for the exhaust. The image I posted on my first post is the exact picture after I disassembled it.

At first I thought someone had already tried to fix this one and forgot to return the fins. But the owner was sure that it was never brought for repair. This was the first time it had a problem since they bought it almost 5 years ago.

A friend mentioned that I must put the copper shim on top and to the right side of the sink to the edge, closer to the fan, this is to let the copper absorb the heat away from the processor and the bga chips. If I put the copper on top which is aligned directly above the chip, the heat will only stay there. Please check the image for clarification. thanks again.

[domas]

Re: How to solve overheating issue?

As far as I understand you are going to connect heatsinks with metal fan housing, right? Well this should help, but do not expect very high efficiency. Because the air will flow over fans internal surface which has some area, but not as much as there was some shims on the exhaust.
I would still try to put another fan, maybe a smaller one, and some shims on exhaust. Yes of course this will be not reliable as it would be ghetto and it would require a lot of fabrication.
I do not think that putting copper over chips will be bad – I think it would be a good idea, not sure why your friend said that. As far as I understand, copper is much better in transferring heat than any other metal that is in that computer at the moment. I can offer you some fans/heatsinks if you want, just cover shipping costs.

I guess something of this type should be used. http://www.dhgate.com/product/new-or...162964750.html

[lezsimply]

Re: How to solve overheating issue?

I'll try your suggestions domas. I've got some unused laptop heatsinks here as well. So maybe I can build something out of it. I think it will take me some time to complete. I've got a lot of laptops to fix and I'm just a "one man team". Wish me luck. I'll get back as soon as I finish the modification. Thanks!

[dj_ricoh]

Re: How to solve overheating issue?

do you wanna solder a heatsink? a cooper one?
you need to take all the plastic out and heat the whole pipe like suuuper HOT then you can solder. search on youtube gas pipe how to solder.
if you manage to do this you can put this on your CV and work on another job :P
even on refrigerator they change the cooper pipe and they use the same method to solder.
interesting ... bigger headsink for a HP DV hmmm

[tomodachi]

Re: How to solve overheating issue?

may I ask u something ?
are you testing temperature in disassembled position ? Because its temperature rises really fast when notebook is disassebmled. I guess your model is designed to cool the mobo by using the air entering from bottom holes not by copper. it uses inside ventilation as I see.

[domas]

Re: How to solve overheating issue?

i guess tomodachi is right, thats the stupid design, but lezsimply wants to improve it

[lezsimply]

Re: How to solve overheating issue?

@tomodachi I'm testing it in both ways, inside and outside the case. I examined the case and I can only see holes on the bottom left side of the case. I imagine it as a room with only two openings, one for the air to come in and one for the air to go out. Its like sucking the air one way. I think that's how they thought of the design. Its somewhat like what you have mentioned.

[tomodachi]

Re: How to solve overheating issue?

@tomodachi I'm testing it in both ways, inside and outside the case. I examined the case and I can only see holes on the bottom left side of the case. I imagine it as a room with only two openings, one for the air to come in and one for the air to go out. Its like sucking the air one way. I think that's how they thought of the design. Its somewhat like what you have mentioned.

Don't wanna confuse you but as to what Spidey said to me in another thread, bad bga ball contacts may cause overheat too (mine was GPU chip back then btw) I mean you might be wasting time making changes about original design.

[lezsimply]

Re: How to solve overheating issue?

Good day its been a while since my last post here. Still haven't finished this laptop but I've got some developments.

I salvaged a fan from a different laptop, not same model but it looks quite similar in form so it fitted perfectly. I powered it up and this time it did not turn off. I haven't done any modifications on the heatsink. The thing is I reversed the direction of the fan. Instead of air blowing on the right to extract heat, I turned it the opposite direction to the heatsink. The fan is keeping the sink cool because it receives air from the fan.

I asked myself if the fan blows to the heatsink, what happens to the heat that it produce, it goes nowhere maybe trapped inside which could cause further damage? Just want to ask if this is wrong? many thanks to everyone!

[Th3_uN1Qu3]

Re: How to solve overheating issue?

It should work fine, but over time the insides will get full of dust.

[lezsimply]

Re: How to solve overheating issue?

Its sad to say that problem still persist even though the fan has already been replaced. Possible cause of this is the video chip as what tomodachi had mention. Maybe I'll ask the owner if she decides to go further on reballing the chip because the procedure is expensive. Thanks to everybody!

[jtamad44]

Re: How to solve overheating issue?

if its the gpu, you have to replace it, reball won't work.