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Onsite PC Repair Singapore: No Display Fixed Under Warranty Plus Motherboard Upgrade | Mansa Computers
Quick answer: This onsite PC repair in Singapore fixed a no-display fault caused by faulty CPU and RAM. Both were replaced under warranty at no charge. The customer also took the opportunity to upgrade to an Asus Prime Z790-P motherboard for $425 SGD while the PC was already open. Total out-of-pocket cost: $425 SGD.
Last updated: October 2025
Job Summary
Service
Onsite PC repair in Singapore: CPU and RAM replaced under warranty, plus optional Asus Prime Z790-P motherboard upgrade
Customer's Problem
PC sometimes failed to turn on and showed no display when it did power up. No POST, no signal to the monitor.
What We Did
Replaced the faulty CPU and RAM under warranty. Customer added an Asus Prime Z790-P motherboard upgrade for $425 SGD while the PC was already open.
Result
PC boots, display working, all components stable. Customer went home with a fixed PC and a better board.
Watch the Repair
Why Was There No Display?
A customer's PC in Singapore would sometimes fail to turn on, and when it did power up, there was no display output. The screen stayed black. No Windows, no BIOS screen. The PC was not completing its startup sequence.
Intermittent boot failures with no display point directly to the CPU or RAM. Both are required for a PC to complete POST (Power-On Self-Test) and send any signal to the monitor. A fault in either component stops the PC before it gets to the display.
Root Cause
Diagnostics showed the CPU would not boot properly, while the RAM was causing a no-display condition. Both components were replaced under warranty. The customer also chose to upgrade to a new Asus Prime Z790-P motherboard while the PC was already being worked on.
What We Checked First
- Power delivery: PC sometimes powered on but would not complete POST
- Display output: monitor, cable, and GPU all tested and confirmed working
- RAM: tested sticks individually and in different slots
- CPU: confirmed fault, replacement sourced under warranty
- Motherboard: customer opted to upgrade rather than keep the existing board
How We Fixed It
- Fault isolated: PC failed POST intermittently and showed no display. GPU, monitor, and cables were ruled out. CPU and RAM were confirmed as the faulty components.
- CPU and RAM replaced under warranty: Both components swapped at no charge. Mansa's hardware warranty covers failed parts within the warranty period, including labour and the replacement components.
- Motherboard upgrade added: With the PC already open and the CPU and RAM out, the customer chose to upgrade to an Asus Prime Z790-P motherboard. This is the right time to do it: the PC is already apart, and the upgrade adds a newer board with better features.
- System confirmed: PC booted, BIOS and Windows loaded, display working. All components tested and stable before leaving the customer.
Photo Guide
Swipe or use arrows to see the repair process.
Onsite Warranty Visit
Customer had a no-display issue, so we went onsite to diagnose and get the system running again.
Disassembling the Old Motherboard
Old motherboard removed as part of the customer’s upgrade while the warranty parts were being handled.
CPU Installation
CPU installed onto the new motherboard, ensuring proper placement before reassembly.
RAM Installation
RAM installed and secured onto the new motherboard to complete the platform setup.
Final Testing
System powered on and fully tested after the CPU, RAM, and motherboard upgrade were completed.
"When a PC fails to POST and shows no display, the GPU and monitor are the first things people suspect. But if those check out, it's almost always the CPU or RAM. A no-display fault with intermittent boot failures narrows it down fast. A warranty repair is also a good time to upgrade: the PC is already open, and adding a new board takes minutes."
- Mansa ComputersFinal Result
PC boots and displays normally. CPU and RAM replacement covered under warranty at no charge. The Asus Prime Z790-P motherboard upgrade was $425 SGD, chosen by the customer as an optional add-on during the repair visit.
Mansa's warranty covers hardware faults within the warranty period: the faulty part and the labour, no extra cost. If you want to add an upgrade during a warranty visit, we can price it up on the spot.
Cost Breakdown
| Service / Parts | Cost (SGD) |
|---|---|
| CPU replacement (warranty) | Covered under warranty |
| RAM replacement (warranty) | Covered under warranty |
| Asus Prime Z790-P motherboard upgrade (optional) | $425 |
| Total paid by customer | $425 SGD |
CPU and RAM replacement were covered under Mansa's hardware warranty. The Asus Prime Z790-P motherboard was an optional upgrade chosen by the customer. Repair and upgrade costs vary. Press the WhatsApp button on the right to get a quote or check your warranty coverage.
Frequently Asked Questions
Why does my PC turn on but show no display?
The most common causes are a faulty GPU, RAM, or CPU. Start by checking the monitor cable and trying a different display port. If the screen is still blank, test with a known-good monitor. If that doesn't help, the PC is likely failing POST: RAM and CPU are the next things to check. A technician can isolate the fault with proper testing and known-good spare parts.
Can I upgrade my PC at the same time as a warranty repair?
Yes. If we are already opening your PC for a warranty repair, adding an upgrade during the same visit is straightforward. In this case, the customer added an Asus Prime Z790-P motherboard upgrade for $425 SGD on top of the warranty repair visit. The warranty covers the faulty parts; the upgrade is priced separately. WhatsApp us and we can quote the upgrade before the visit.
Does Mansa's onsite warranty cover CPU and RAM replacement in Singapore?
Yes. Mansa's hardware warranty covers failed components within the warranty period, including CPU, RAM, GPU, motherboard, and storage. The replacement part and the labour are both covered at no charge. For onsite visits, transport is also included in the first year of warranty. WhatsApp us your issue and purchase date and we will confirm your coverage.
PC Not Turning On or No Display in Singapore?
Tell us what happens when you press the power button. We'll help you figure out if it's a warranty fault or what the repair cost would be.
Press the WhatsApp button on the right to speak with us.
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