Tianhe a college student customer association rescuer Y7000P (Model 2023, i7- 13700HX + RTX4060) The description when it was delivered was very typical: "It must be turned off after ten minutes of playing Fearless Contract. Before turning off, the fan sounds like an airplane taking off. Touching the keyboard is hot." The machine has no hardware fault light, everything is normal after restarting, until the next full load-this is the cooling system triggered the CPU overheat protection (PROCHOT/THERMTRIP), the temperature hit 100℃ forced power off.
First look at the data, confirm that it is a cooling problem
Connect HWiNFO64 monitor, AIDA64 single bake FPU for three minutes:
| index | before servicing | post-repair | normal range |
|---|---|---|---|
| CPU package temperature | 98 - 100 ℃ (3 minutes after the wall shutdown) | Stable at 79-83℃ | <90℃ |
| CPU power consumption (PL1 release) | Dropped from 55W to 28W (frequency down) | 55W stable throughout the journey | According to the model specifications |
| GPU temperature | 87℃ | 71℃ | <80℃ |
| fan speed | 5800 RPM, full rotation, still not holding down. | 4100 RPM | varies with load |
| 3DMark Time Spy Total Score | 8900 (run half down) | 11600 | This model is about 11500 |
The fan can't be pressed at full speed, and the power consumption is cut by half — the heat is not taken out of the fuselage at all, but blocked in the cooling module.
Dismantling process and three discoveries
Y7000P disassembly is not difficult: remove the bottom shell 11 screws (two of which are under the foot pad), pry the bar along the gap to open the buckle, disconnect the battery cable and then start. Three discoveries are shocking:
- dust blanket: At the position of the cooling fin air outlet shared by the CPU/GPU, a layer of completely formed gray felt is accumulated, with a thickness of about 3mm, blocking 70% of the air outlet area. This is why the fan is running wildly but there is no wind.
- thermal paste crack: The original thermal paste has dried into gray white powder, leaving obvious pumping marks on the CPU core (thin in the middle and thick on the edge). 3 years of game, thermal paste life is up.
- collapse of thermal pad: The thermal pad on the power MOS tube is pressed into the thickness of paper and cracked, and this part of the heat basically has no conduction path.
Cleaning and replacement: material selection is exquisite
- deashing: After removing the cooling module, clean the fins with soft brush + air blowing, and wipe the fan impeller one by one with cotton swab (do not blow the fan directly with high pressure air, which will cause the fan to burn the motherboard). Use anti-static brush inside the fuselage with vacuum cleaner.
- thermal paste: CPU/GPU core with Xinyue MX-7921 (about RMB 45/2g), non-conductive, good durability, is the standard material in our store. Liquid gold is not recommended-conductive, corrosion aluminum, game This cooling module is mostly aluminum base plate, rollover cost is the whole motherboard.
- thermally conductive pad: MOS and memory position for Limin Odyssey 1.5mm (about RMB 30), thickness must be consistent with the original factory, before buying with calipers to measure the original thickness before collapse or check the machine diagram, pad too thick will lead to the radiator pressure is not tight core, the effect is worse.
- fan spindle bearing: The fan of this unit has no abnormal noise, so there is no need to replace it. If the fan has a "click" sound, directly replace the fan (Y7000P original fan RMB 120–180 a pair), refueling can only be a month.
Reassembly and Acceptance
The order of reinstallation is opposite to that of disassembly. Pay attention to three points: the battery cable is connected last; the screws of the cooling module are tightened in diagonal order (one screw at a time will make the core force uneven); the bottom shell buckle is pressed one by one from one side.
Acceptance criteria (our shop rules, none of them):
- AIDA64 single bake FPU 30 minutes: temperature ≤85℃, no frequency reduction, irrelevant machine;
- FurMark single baked GPU 20 minutes: temperature ≤80℃;
- Double bake for 10 minutes (harshest scenario): no impact on temperature wall;
- Actual game "Fearless Contract" 1 hour: frame rate stable, body keyboard area feel temperature normal.
The total cost of this machine: RMB 150 for cleaning ash and changing thermal paste for thermal pad (with thermal paste thermal pad working hour price), throughout is 1.5 hours. When the student customer gets the burn-in test report, the original words: "It feels like a new computer."
How often should I dust my laptop?
According to the use environment: Guangzhou back to the south + dust environment, game this/high performance this is recommended once every 18-24 months; thin and light this low power consumption, once every 2-3 years; home pets or machines put on the bed, shortened to 12 months. Judgment signal: the same scene fan speed is significantly higher than before, the body temperature is obviously hot, performance inexplicably decreased (frequency reduction), two of the three should be arranged to dust cleaning.
ACCPC laptop dust removal change thermal paste standard price RMB 120–200 (according to the difficulty of disassembly classification: ordinary thin book 120, game book 150, high-end mold/liquid gold model 200+), the whole burn-in test acceptance, temperature comparison report on the spot. Panyu District on-site, other areas can be Shunfeng to pay.