Samsung TV Error 4 — What It Means & How to Fix It

What Does This Error Mean?

Error 4 on a Samsung TV indicates a standby or power supply fault that prevents the TV from fully powering on. The TV may show the Samsung logo and then stop, or cycle between standby and start repeatedly. This often requires a professional repair as the power board or main board may be failing.

Affected Models

Samsung QLED Q80B
Samsung QLED Q70A
Samsung Crystal UHD AU8000
Samsung The Frame
Samsung Neo QLED QN90B

Common Causes

Power supply board has failed or is delivering insufficient voltage
Main board has a fault that prevents it from completing startup
Capacitors on the power board have swollen or failed
Firmware corruption preventing the TV from booting past the startup sequence
Voltage fluctuation or power surge has damaged internal components

How to Fix It

Unplug the TV from the wall completely and wait 60 seconds, then plug it back in.

A deep power drain can clear capacitor charge and resolve transient power startup errors.
Plug the TV directly into a wall outlet — not a power strip or surge protector.

Some power strips limit current draw, which can prevent the TV from drawing enough power at startup.
Try a different power outlet on a different wall circuit to rule out a wiring issue.

A circuit with a voltage drop can cause intermittent power faults.
Hold the power button on the back of the TV (not the remote) for 10 seconds.

On some Samsung models, holding the physical button forces a full reset of the startup routine.
Check if a Samsung firmware update is available by connecting to Smart Hub on a temporary basis if the TV partially powers on.

Firmware corruption can sometimes cause Error 4 — a successful update may fix it.
If none of the above work, contact Samsung support or a qualified TV repair technician.

Error 4 at this point almost certainly indicates a hardware fault needing component-level repair.

When to Call a Professional

Error 4 is a hardware-level fault that usually requires a technician to diagnose. A skilled technician can test the power board with a multimeter and replace it for $100–$250. If the main board is also affected, repair may approach or exceed the cost of a replacement TV.

Frequently Asked Questions

Is Samsung TV Error 4 covered under warranty?

Yes — if your TV is within the standard Samsung warranty period (typically 1 year), Error 4 hardware faults are covered. Contact Samsung support with your model and serial number to arrange a repair or replacement. Extended warranty plans may cover repairs beyond the standard period.

Can a power surge cause Samsung TV Error 4?

Yes — power surges can damage the power supply board and cause Error 4. A surge protector with adequate joule rating (at least 1000 joules) helps protect your TV. If you had a recent storm or power flicker, this is a likely cause.

How much does it cost to repair Samsung TV Error 4?

A power board replacement typically costs $100–$250 including labor. If the main board is also damaged, total repair cost rises to $200–$400. For older TVs, it may be more cost-effective to replace the TV than repair it.