GPU Fan Not Spinning? Fix PWM IC & PCIe Gold Finger Issues
Introduction
If your graphics card fan has stopped spinning or the PCIe gold fingers are cracked, you are not alone. These are two of the most common GPU problems I see in my repair shop in Hong Kong. In this guide, I will walk you through the causes, the repair process, and the costs involved, based on my 15+ years of hands-on experience.
What Causes a GPU Fan to Stop Spinning?
A GPU fan that stops spinning is usually caused by one of three things: a dead motor, a broken wire, or a faulty PWM control IC. The PWM (Pulse Width Modulation) IC is the chip that tells the fan how fast to spin based on temperature. When it fails, the fan may not spin at all, even under heavy load.
In my experience, around 60% of fan failures are due to a faulty PWM IC, not the fan motor itself. The other 40% are split between worn-out bearings and broken wires. You can often tell the difference by listening for a clicking sound or trying to spin the fan manually with the power off.
How Do You Fix a PWM IC That's Not Working?
To fix a faulty PWM IC, you need to replace the chip. This requires a hot air rework station, solder paste, and a donor IC of the same model. Here's the step-by-step process I use in my workshop:
- Remove the fan assembly from the GPU.
- Locate the PWM IC, usually near the fan header.
- Apply flux and heat the IC with hot air until it lifts off.
- Clean the pads with solder wick.
- Place the new IC on the pads and reflow it with hot air.
- Test the fan with a multimeter or by powering the GPU.
If you don't have the right tools, this is not a DIY job. Forcing it can damage the PCB. I've seen many cards come in with ripped pads because someone tried to solder without proper equipment.
What Are the Signs of a Cracked PCIe Gold Finger?
The PCIe gold fingers are the metal contacts at the bottom of your GPU that plug into the motherboard. A cracked gold finger usually happens when the card is inserted at an angle or when the card is heavy and sags over time. The most common signs are:
- Display flickers or goes black when you move the PC case
- The GPU is not detected by the system
- Visual artifacts on screen, like lines or squares
If you suspect a cracked gold finger, inspect the edge visually. You might see a hairline crack or a chipped contact. Sometimes the damage is internal, and you need a microscope to see it.
How Do You Repair a Cracked PCIe Gold Finger?
Repairing a cracked PCIe gold finger is delicate work. The process involves:
- Cleaning the area with isopropyl alcohol.
- Using a scalpel to expose the copper trace underneath the crack.
- Applying a small amount of solder to bridge the gap.
- Optionally, using a UV-curable solder mask to protect the repair.
- Testing continuity with a multimeter.
In my experience, about 70% of cracked gold fingers can be repaired this way. If the crack is too severe or the trace is lifted, you may need to run a jumper wire from the gold finger to a test point on the PCB. That's a more advanced fix that I only recommend for professionals.
How Much Does GPU Repair Cost in Hong Kong?
Here's a breakdown of typical costs for these repairs at ComputerKing:
| Repair Type | Average Cost (HKD) | Time Required |
|---|---|---|
| PWM IC replacement | $300 - $600 | 1-2 hours |
| Fan replacement (not IC) | $200 - $400 | 30 minutes |
| PCIe gold finger repair | $400 - $800 | 2-3 hours |
| Full GPU diagnostic | $100 - $200 | 30 minutes |
These prices are based on my current rate card. Compared to buying a new GPU, which can cost thousands of dollars, repairing is often the smarter choice, especially for high-end cards like the RTX 4090.
Can I Prevent These Issues in the Future?
Yes, you can reduce the risk of fan and gold finger failures with a few simple habits. Use a GPU support bracket to prevent sagging, which is a major cause of cracked gold fingers. Keep your PC clean and dust-free to prevent fan bearing wear. And always handle the GPU by the edges, never by the gold fingers.
In Hong Kong's humid climate, I also recommend storing your GPU in a dry place if you're not using it for a while. Moisture can corrode the gold fingers and shorten the life of the PWM IC. A silica gel pack in your storage bag can help.
What Tools Do I Need for DIY Repair?
If you're tempted to try these repairs at home, here's what you'll need, along with the approximate costs in Hong Kong:
- Hot air rework station (HKD 800 - 2,000)
- Soldering iron with fine tip (HKD 300 - 800)
- Solder wick and flux (HKD 50 - 150)
- Multimeter (HKD 100 - 300)
- Magnifying lamp or microscope (HKD 200 - 1,000)
Keep in mind that buying these tools only makes sense if you plan to repair multiple cards. For a one-off fix, taking it to a professional is cheaper and safer.
When Should You Just Replace the GPU Instead of Repairing?
Sometimes repair isn't worth it. If the GPU is an older model (more than 6 years old) and the repair cost exceeds 50% of its current market value, I recommend replacing it. Also, if the PCB itself is severely damaged, such as a cracked board from a drop, repair success rates drop significantly.
In my shop, I always give an honest assessment. I'd rather tell you to buy a new GPU than take your money for a repair that might fail in a few months. That's how I've built trust with my customers over the years.
Frequently Asked Questions
Q: Can a GPU fan be repaired without replacing the whole fan?
A: Yes, if the issue is a faulty PWM IC, you can replace just the IC. However, if the fan motor itself is dead, you'll need to replace the entire fan assembly.
Q: How long does a PCIe gold finger repair last?
A: A properly done repair can last as long as the original, provided you handle the card carefully afterward. Using a support bracket is key to preventing recurrence.
Q: Is it safe to use a GPU with a cracked gold finger?
A: It's risky. A cracked gold finger can cause intermittent connections, which may lead to short circuits or damage to the motherboard. It's best to repair it before using the card again.
Q: How much does it cost to fix a GPU fan at ComputerKing?
A: At ComputerKing, a fan replacement or PWM IC fix typically costs between HKD 200 and HKD 600, depending on the card model. We offer a free diagnostic for any GPU issue.
Q: Can you repair a GPU with water damage?
A: Yes, water damage is one of my specialties. We clean the PCB and replace any corroded components. Success depends on how quickly you bring it in after the damage occurs.
Conclusion
GPU fan and PCIe gold finger issues are stressful, but they're often fixable with the right skills and tools. If you're not confident in your soldering abilities, don't risk it. Contact ComputerKing at WhatsApp 2186 8010 for a professional diagnosis and repair. We've been serving Hong Kong for over 15 years, and we know how to bring your GPU back to life.
*This article was written by the ComputerKing senior repair team, with over 15 years of computer repair experience in Hong Kong and 10,000+ cases handled. Last updated: 2026-08-23*