Introduction: Repairing an Overheating Laptop by Changing Existing Fan to 12V BLDC Fan and Improving Airflow

Repairing an overheating laptop by changing existing fan to 12V BLDC fan and improving airflow

This tutorial will go over several step to cool down an overheating laptop beyond dust and cleaning and note the inefficiency of laptop heatsinks fans and cooling. This one in particular cannot run CPU@100% beyond 10 minutes below 82C and will gradually climb.

I have already tried replacing thermal compound between CPU and heatsink using polymer silver compund (Arctic Silver)
Silicon compund is not recommended for newer CPU's especially laptops.

You will need an assortment of computer parts like:

several scrap laptops, old graphics cards, small BLDC 12v fans, screws, spare parts,
thermal compund for CPU heatsink reattach; AND tools like:


Anti-Static Wrist Strap connected to an Earth Ground (outlet ground is fine if 1 mega ohm resistor in series of strap) {Very Important -buy one or make your own, steal from school) set small screwdrivers, small pliers, assorted cutting tools, duh  rosin core solder low wattage soldering iron like 40W not the soldering gun.

You need a laptop that overheats and you've already dusted and/or used arctic silver AND it's old, shutdowns on games or updating re-installing ruby, and you don't care if you break something. You will need a table or good concrete floor and start wrecking stuff.

Step 1: Repairing an Overheating Laptop Mod

first put on your anti static wrist strap, and walk on a non ESD surface. Concrete, anti static mats, hot tub, steel, etc.

Next just start rippings hit apart

Also, start ripping apart old laptops and empty all your junk boxes on the floor to find what you need

Step 2: Repairing an Overheating Laptop Mod . Procure Parts and Typical BLDC Fan Disassembly

analyze your spare fans some will be B.B and sleeve

take off back sticker

remover plastic lock washer push axle of fan rotor out if B.B. push out carefully down from opposite end for each using small screwdriver 

If plastic frame slide scredriver gently to push press fitted motor assembly If metal frame place larger screwdriver in front armature part of motor sleeve while supporting exposed back of metal frame to metal block with hole bigger than motor sleeve so you can push sleeve out of motor assy. Now there is just motor assm. you can adapt to fit a modified air flow deal.

Step 3: Repairing an Overheating Laptop Mod . Rigging Examples More Powerful Fan Running at MAX RPM

refer to step 2 and remove your laptop HS CPU

Start monkey rigging some cb examples of different mounts for new More Powerful Fan running at MAX RPM

Step 4: Repairing an Overheating Laptop Mod . Fan Mounting Concerns and Cutting Old Heat Sink Air Chassis

here are examples of problems and different strategies for same laptop.

Must use a blower fan in most cases with straight fins.

Fan can be oriented to mount upside down but might oppose original flow side for air duct

A bigger Fan rotor with long length blades optimal...example in next step

Step 5: Repairing an Overheating Laptop Mod . Optimum Fan Blades on Fan Rotor

The first three images of a fan rotor an example of low air flow ft^3 per minute.

The last one is better.

Step 6: Repairing an Overheating Laptop Mod . Check Clearances, Mount Secure, Attach Air Duct

check fan clearance, pain in fan

check mounting is secure

Suggestion in future, consider super glue instead of: hack screwing  & picking  screws, piece cut threaded sheet metal for back nuts  mounting 'butched' fan mount to heat sink. Didn't stay in place unless undisturbed. Plan C

Try not to modify your existing laptop air duct or if so minimally.
Try a plastic mount glued with  super cyanduhacrylate glue in essential places. Initially temporary mounting is needed for adapting but once fan clears air guide set in place because you can still press place or remove motor assy. like in folowing pictures

Step 7: Repairing an Overheating Laptop Mod . Success?

If it's not working or crappy, so was the engineer that designed it so the CPU operates near or above safe operating area.

That's how some other elec. fail... an STK IC for yoke is just less nominally underrated for load and runs hot for 5 years on always until the IC fails when a higher power STK part was available during time of manufacture that was rated beyond threshold of that "load" in this case -twenty years operating would still work.  Things today I think are designed to run hot. Overheat?

If its working well, start overclocking in linux, software, or potentially BIOS mods. What happened to mobo mods and blank pins?
Over a decade ago, Moore's law etc... why are our clock speeds not exponentiating but slowly adding while parallel architecture is sold in lieu. Before hyper threading, multiple cores, I was running old dual P-200mhz MMX w/ 512 EDO ECC 72 pin (one 128MB EDO ECC 72 pin $160.00 used) dual P2, P3, xeon etc. All it really did was make multitasking faster. Programs ran at the clock not adding both speeds, SMP glue etc hasn't changed this dramatically imo, just CPU throttles differently... multi cores great idea! but give me triple clock speed each core. 8.0101 GHz clock per core/CPU + use ~uh status quo 3.~GHz for FS Bus + full speed external upgradable L2 cache socket. That would outperform a system with well over 16 cores at  3GHz CPU clock in my opinion.
I had an xseries server with 4 CPUs, Quad IBM xeon 900MHz 2MB cache, 100MHz FSB, (4Gbytes mem.) using XP, server 03 and
running rar password recovery I had 9 words/per sec, software optimized for multi CPU;  on P4 3.06GHz 14 words/per sec. Others
it increased w/ CPU clock more that cores...

So take run mill somethings hi it tyand attempt to reverse engineer so you can execute hard core for 45 min or avoid weird errors, But, perhaps you're just taking things apart because they sold you a great product and you're a tinkerer.?! I have real quality made electronics 30 years old and everything's perfect wouldn't part, even old mobo's have really good shielding, very conductive signal paths, and Au,Ag trace, low Hysteresis AU AG LSI VLSI chips.

I want to tinker duh WTF why clock rate same why make want parallel cpu slow advance tard

Step 8: Repairing an Overheating Laptop Mod Success?

Comments

author
gospodinBIH (author)2016-01-24

Didn't work for me, had to buy a new one.