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PC Repair Singapore: PC Loud Pop and Burning Smell
Quick answer: If your PC makes a loud pop followed by a burning smell, switch it off and do not try turning it back on. The fault should be tested before replacing any parts. In this case, Mansa tested the PC with a known-good power supply and confirmed the original PSU had failed using a PSU tester. A new Thermalright KG 850W was installed, the system was stress-tested, and the PC was returned to the customer within the same day. Total cost: $270 SGD.
Last updated: September 2026
Job Summary
Service
PSU replacement in Singapore
Customer's Problem
Loud pop from PC followed by a burning smell; PSU failure confirmed during testing
What We Did
Tested with known-good PSU, confirmed fault with PSU tester, installed Thermalright KG 850 W, stress-tested
Result
PC booted clean and passed full stress test; returned to customer within the same day
Watch the Repair
Why Did My PC Make a Loud Pop and Smell Like Burning?
A loud pop followed by a burning smell indicates that an electrical component may have failed and the PC should not be powered on again until it has been checked. In this case, testing showed that the power supply was the failed component. Mansa first powered the system using a known-good PSU, then used a PSU tester to confirm that the original power supply had failed.
This customer reported hearing a loud pop from the PC, followed immediately by a burning smell. Rather than replacing the PSU immediately, we first tested the system using our own known-good PSU. Once the system powered on with the test PSU, we used a PSU tester to confirm the original unit had failed. The customer approved a replacement quotation and the job was completed within the same day.
Root Cause
The original power supply had failed. Testing the PC with a known-good PSU allowed the system to boot normally, and a PSU tester was then used to confirm the fault with the original unit. The failed PSU was replaced with a new Thermalright KG 850W.
What We Checked First
- Powered the system on with a known-good test PSU to confirm the PC's other components were working
- Used a dedicated PSU tester to verify the original power supply had failed
- Inspected the motherboard and GPU for secondary damage from the PSU failure
- Confirmed all internal power cables and connections were in good condition
How We Fixed It
- Tested with a known-good PSU: Powered the system using our known-good PSU to check whether the PC could boot normally without the original power supply.
- Confirmed with a PSU tester: Used a dedicated PSU tester to verify that the original power supply had failed.
- Quoted and got approval: Prepared a quotation for the customer and waited for approval before proceeding with the replacement.
- Installed the Thermalright KG 850 W: Removed the failed PSU, installed the new unit, and reconnected all internal power cables.
- Ran a full stress test: The PC booted clean and completed the stress test without errors. The system was returned to the customer within the same day.
Photo Guide
Swipe or use arrows to see the repair process.
Inspecting the PC Internals
We opened the customer’s PC and inspected the internal components after they reported a loud pop followed by a burning smell.
Testing the PC with a Known-Good PSU
We powered the system using our own known-good power supply to check whether the PC could still boot normally.
Installing the Replacement Power Supply
After confirming the original PSU had failed, we installed a new Thermalright KG 850W power supply and reconnected the system.
Running a Full Stress Test
We stress-tested the rebuilt PC after the PSU replacement to confirm the system was stable and running without errors.
"If a PC makes a loud pop followed by a burning smell, don't keep trying to power it on. The fault should be tested before replacing parts. In this case, we tested the system with a known-good PSU and then used a PSU tester to confirm that the original power supply had failed."
Mansa ComputersFinal Result
The PC booted clean after the Thermalright KG 850 W was installed and passed a full stress test with no errors. The repair was completed and the system was returned to the customer within the same day.
If your PC makes a loud pop or you smell burning, switch it off at the wall immediately and do not turn it back on. Mansa can test and confirm the fault before any parts are ordered.
Cost Breakdown
| Service / Parts | Cost (SGD) |
|---|---|
| Pickup and delivery | $40 |
| Service and installation | $80 |
| Thermalright KG 850 W power supply | $150 |
| Total | $270 |
Repair costs vary depending on the issue and parts needed. This is the cost for this specific job. Press the WhatsApp button on the right to speak with us about your PC issue.
Frequently Asked Questions
What causes a loud pop and burning smell from a PC?
A loud pop followed by a burning smell indicates that an electrical component may have failed. Switch the PC off and do not try turning it back on until the fault has been tested. In this repair, Mansa confirmed that the power supply had failed using a known-good PSU and a PSU tester.
How much does a PSU replacement cost in Singapore?
This PSU replacement cost $270 SGD in total: $150 for the Thermalright KG 850W power supply, $80 for service and installation, and $40 for pickup and delivery. Repair costs vary depending on the PSU and work required.
Is it safe to turn on a PC after it makes a loud pop?
No. If your PC made a loud pop and you can smell burning, switch it off at the wall and leave it off. Turning it back on could cause further damage if an electrical component has failed. Contact a technician before attempting to power it on again.
Heard a Pop or Smelled Burning from Your PC?
Switch it off at the wall and message us before you try turning it back on. We'll tell you what to do next.
Press the WhatsApp button on the right to speak with us about your PC issue.
Need some help with your PC?
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Give us a brief description of the issue you're facing and we'll get back to you in the quickest time possible.
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