Desktop Not Turning On Dhaka — Power Supply & Fix Guide

13 July 2026 · 12 min read · BAYAS Editorial

If your desktop PC is not turning on in Dhaka, the most common causes are a failed power supply unit (PSU), a tripped surge protector, a loose power cable, or a faulty motherboard. BAYAS diagnoses desktop power failures at your home starting from BDT 700 across 36 Dhaka zones — same-day service available.

Key Takeaways

Most common cause: Failed PSU after Dhaka load-shedding or voltage surge — BDT 2,500–7,000 to replace
Free self-check first: Verify power cable, reset surge protector, confirm PSU rocker switch is ON (|)
Professional diagnosis: BAYAS home visit starts at BDT 700, credited toward repair cost
Motherboard repair: BDT 3,000–12,000 chip-level; BDT 5,000–20,000+ for full replacement
Book now: WhatsApp BAYAS at 01712-644590 for same-day desktop diagnosis in Dhaka

Why Is My Desktop PC Not Turning On in Dhaka?

Desktop power failures in Dhaka are more common than in most cities because of two factors: frequent load-shedding cycles and voltage fluctuations during generator switchover. These two conditions are the leading cause of PSU and motherboard damage in Dhaka homes and offices.

When your desktop does not turn on, the problem falls into one of four categories:

External power issue — wall socket, surge protector, or UPS fault (solve yourself in 2 minutes)
PSU failure — the internal power supply unit has died (most common hardware cause)
Motherboard fault — short circuit, capacitor burst, or BIOS chip failure
RAM or GPU seating issue — component dislodged after movement or upgrade

Understanding which category applies determines whether you can self-fix or need a professional technician.

Step 1: Free Self-Checks Before Calling a Technician (5 Minutes)

Before spending money on a technician, run these four checks. They solve roughly 20% of "desktop won't turn on" cases in Dhaka for free.

Check 1: Power Cable and Wall Socket

Unplug the power cable from the back of your PC
Plug it back firmly at both ends — at the PSU and at the wall/surge protector
Test the wall socket with a phone charger to confirm the socket is live
If using an extension board, bypass it and plug directly into the wall

Check 2: PSU Rocker Switch

On the back of your PC (behind the power supply), there is a small rocker switch marked O/I or 0/1. It must be set to I (ON). Load-shedding or voltage surges sometimes trip this switch. Flip it to ON and try again.

Check 3: Surge Protector Reset

Quality surge protectors (APC, Maxguard, Havells) have a reset button that trips during voltage spikes. Press the reset button and try powering on. If no reset button is visible, replace the surge strip — it may have burned out.

Check 4: UPS Battery Check

If your PC is connected to a UPS, check that the UPS is powered and not displaying an alarm. Many UPS units in Dhaka silently fail after 2–3 years of load-shedding cycles. Disconnect the UPS and plug the PC directly into the wall to test.

Step 2: Identify the Failure Pattern

If the self-checks above do not resolve the issue, use this diagnostic table to identify the likely hardware fault:

Symptom	Most Likely Cause	Recommended Action
No fan spin, no LED, no beep	PSU completely dead	PSU test and replacement
Fan spins 1–2 seconds then stops	PSU weak/overloaded, or motherboard short	PSU stress test, motherboard inspection
Fans spin, no display, no beep	GPU fault, RAM not seated, no POST	Reseat RAM and GPU
Single long beep on power-on	RAM failure or not seated correctly	Reseat RAM sticks, test one at a time
Continuous beeping	RAM failure or keyboard fault	RAM retest or keyboard disconnect
LED flashes but no power	Capacitor burst on motherboard	Motherboard visual inspection
Burning smell	PSU internal burn or capacitor	Do NOT retry — call technician immediately
PC powers on then shuts off in 5–10 seconds	Thermal shutdown (overheating) or PSU under-voltage	Clean heatsink, test PSU output

PSU (Power Supply Unit) Failure — The Most Common Cause in Dhaka

A dead PSU is the single most common reason a desktop will not turn on in Dhaka. PSU lifespans are dramatically shortened by:

Load-shedding surges: Each time power cuts and restores, a voltage spike occurs. Without adequate surge protection, this stress accumulates inside the PSU capacitors.
Cheap generic PSUs: Many desktop PCs assembled in Dhaka's Elephant Road market use unbranded 450W–550W PSUs that fail within 1–3 years.
Overpowering: Gaming PCs or workstations with high-end GPUs paired with low-wattage PSUs draw excess current during load, degrading components faster.

How BAYAS Tests a PSU at Your Home

BAYAS technicians carry a dedicated PSU tester to your home. The test takes under 5 minutes:

Disconnect the PSU from all internal components
Connect the PSU tester to the 24-pin ATX connector
Switch the PSU on — the tester displays voltage readings on each rail (+3.3V, +5V, +12V)
A healthy PSU shows green indicators on all rails
A failed PSU shows red/no reading — confirmed dead

This test is included in the BDT 700 home diagnosis fee. If replacement is needed, BAYAS carries common PSU units (400W–750W) and can replace on-site within the same visit.

Motherboard Faults — Second Most Common Cause

If the PSU tests healthy but the PC still does not start, the motherboard is the next suspect. Common motherboard faults in Dhaka desktops:

Capacitor Burst

Electrolytic capacitors on the motherboard swell or burst during repeated voltage surges. Visual signs: bulging tops on small cylindrical components near the CPU socket. BAYAS technicians perform chip-level capacitor replacement — a precision soldering repair — rather than replacing the entire board.

BIOS Chip Failure

The BIOS chip stores POST instructions. A corrupted or failed BIOS chip prevents the system from sending any power-on signal. BAYAS can reflash or replace the BIOS chip.

Short Circuit

A motherboard short circuit (from a loose standoff screw, conductive debris, or a failed component) causes immediate shutdown on power-on. BAYAS uses a short circuit detection tool to identify the shorted section.

Repair Costs — Desktop Not Turning On in Dhaka (2026)

Component / Service	BAYAS Cost (BDT)	Typical Time
Home diagnosis (credited)	700	Same day
PSU replacement (labour only)	2,500–4,000	1–2 hours
Budget PSU unit (400W–550W)	2,500–4,500	On-site
Mid-range PSU unit (650W–750W, branded)	4,500–7,000	On-site
RAM reseating	Free with visit	15 minutes
GPU reseating	Free with visit	15 minutes
Capacitor replacement (chip-level)	2,000–5,000	2–3 hours
BIOS chip reflash	1,500–3,000	1–2 hours
Motherboard chip-level repair	3,000–12,000	1–3 days
Full motherboard replacement	5,000–20,000+	2–5 days
CMOS battery replacement	500–800	15 minutes
UPS battery replacement (12V 7Ah)	1,200–2,500	30 minutes

All costs include home visit across 36 Dhaka zones. Parts cost separate where indicated.

Desktop PC vs Laptop: Different Power Failure Patterns

Factor	Desktop PC	Laptop
PSU location	Internal (replaceable)	External adapter (simpler fix)
Surge vulnerability	High — direct mains connection	Moderate — adapter absorbs some
DIY repair difficulty	Moderate (modular components)	High (integrated design)
Average PSU replacement cost (BDT)	5,000–11,000	1,500–3,500 (adapter only)
Motherboard repair feasibility	Good (ATX standard)	Limited (proprietary)
Home service available	Yes — BAYAS	Yes — BAYAS

For a laptop that won't turn on, see our Laptop Not Turning On Guide.

When to Choose Repair vs Replacement

Desktop Age	PSU Fails	Motherboard Fails	Recommendation
Under 3 years	✅ Always repair	✅ Repair (chip-level)	Repair is value-positive
3–5 years	✅ Repair	⚠️ Evaluate repair cost vs upgrade	Repair if cost is under 30% of new PC value
5–7 years	✅ Repair (with quality PSU)	⚠️ Consider upgrade	Full component upgrade may be better value
Above 7 years	⚠️ Consider full rebuild	❌ Not cost-effective	Invest in a new system

BAYAS technicians will give you an honest recommendation during the BDT 700 diagnosis — we do not push unnecessary repairs.

How to Prevent Desktop Power Failures in Dhaka

Power failures are preventable in most cases. These three measures protect the majority of Dhaka desktops:

Use a Quality UPS

An online UPS (APC, Mercury, Power Guard) with automatic voltage regulation (AVR) prevents surge damage during load-shedding switchover. Recommended minimum for a desktop with a monitor: 1,000VA–1,500VA. Cost: BDT 7,000–15,000. This single investment prevents 80% of PSU and motherboard failures.

Use a Branded PSU

Budget PSUs from Elephant Road market (unbranded Chinese units) have weak capacitors that fail after 12–18 months of Dhaka power conditions. Investing in a Seasonic, Corsair, or Cooler Master PSU (BDT 4,500–9,000) gives 5–7 years of reliable operation.

Annual Cleaning and Inspection

Dust accumulation inside the PC causes overheating that stresses the PSU and VRM (voltage regulator module) on the motherboard. BAYAS recommends professional internal cleaning every 12 months. See our PC Cleaning Service Dhaka guide for details.

Frequently Asked Questions

Why is my desktop PC not turning on in Dhaka?

The most common causes are: (1) failed PSU after a Dhaka load-shedding surge, (2) PSU rocker switch accidentally set to OFF, (3) tripped surge protector, (4) RAM not seated after a recent upgrade, (5) motherboard capacitor failure. Start with the free 5-minute self-checks above. If still not starting, WhatsApp BAYAS at 01712-644590 for a same-day home diagnosis starting at BDT 700.

How much does it cost to fix a desktop that won't turn on in Dhaka?

BAYAS home diagnosis starts at BDT 700 (credited toward repair). PSU replacement: BDT 2,500–4,000 labour plus BDT 2,500–7,000 for the PSU unit depending on wattage. RAM reseating is free with a paid visit. Motherboard chip-level capacitor repair: BDT 2,000–5,000. Full motherboard repair: BDT 3,000–12,000. BAYAS provides a transparent quote before starting work.

Can BAYAS fix a dead desktop at my home in Dhaka?

Yes. BAYAS certified technicians carry PSU testers, POST diagnostic cards, CMOS battery kits, and common spare parts (PSU units, RAM, CMOS batteries) to your home. Most diagnoses complete within 30 minutes. Simple repairs like RAM reseating, CMOS battery replacement, and PSU swaps are done on-site. Chip-level motherboard repairs go to the BAYAS workshop with free pickup and delivery.

How long does desktop power supply repair take in Dhaka?

If the fault is a dead PSU, BAYAS can diagnose and replace it within the same home visit — typically 1–2 hours total. Motherboard chip-level repairs (capacitor replacement, BIOS reflash) take 1–3 days in workshop. BAYAS provides a loaner timeline at time of diagnosis. Home visit can be booked same-day in most Dhaka zones via WhatsApp 01712-644590.

What is the BAYAS home visit area for desktop repair in Dhaka?

BAYAS covers 36 Dhaka zones including Uttara, Gulshan, Dhanmondi, Mirpur, Banani, Bashundhara, Mohammadpur, Old Dhaka, Wari, Motijheel, Elephant Road, New Market, Farmgate, Lalmatia, Rayer Bazar, Shyamoli, Adabor, Khilgaon, Rampura, Badda, Baridhara, and more. Same-day booking is available. WhatsApp 01712-644590 to confirm availability in your area.

Should I use a UPS with my desktop PC in Dhaka?

Yes — a quality UPS with AVR is essential in Dhaka where load-shedding and voltage fluctuations are frequent. An APC Back-UPS 1100VA (BDT 8,000–12,000) prevents the majority of PSU and motherboard failures caused by power surges. Without a UPS, even a premium PSU will degrade within 2–3 years of Dhaka power conditions.

My PC was working fine yesterday. What caused it to stop turning on overnight?

The most likely cause is a voltage surge during an overnight load-shedding cycle. Even a brief power restoration spike is enough to burn PSU capacitors in an unprotected system. If your PC was plugged in overnight without a quality surge protector or UPS, PSU failure is the primary suspect. BAYAS BDT 700 diagnosis confirms this within 30 minutes.

Can I test the PSU myself before calling a technician?

Yes, with a paperclip test: disconnect all PSU cables from components, find the 24-pin ATX connector, and use a paperclip to bridge the green wire (PS_ON, pin 16) to any black wire (GND). Turn the PSU on via the rocker switch. If the PSU fan spins, it has basic function. However, this test does not confirm voltage rail accuracy — a failing PSU may spin its fan but deliver incorrect voltages. A dedicated PSU tester (BDT 500–800) or BAYAS technician gives accurate results.

Related Guides and Services

Desktop Repair Service Dhaka — Professional desktop repair at home
Computer Power Supply Problems Bangladesh — Complete PSU troubleshooting guide
Best UPS for Desktop PC Bangladesh — Protect your PC from load-shedding damage
PC Cleaning Service Dhaka — Annual maintenance to prevent overheating failures
Computer Repair Home Service Dhaka — All computer repairs at your doorstep