LG TV Error Code P07 — What It Means & How to Fix It

What Does This Error Mean?

P07 on an LG TV indicates a fault with the T-Con board or the connection between the main board and the display panel. You may see a completely blank screen, vertical lines, or a distorted picture even though the TV is powered on. This requires professional diagnosis — the T-Con board may need reseating, cleaning, or replacement.

Affected Models

LG OLED C3
LG QNED85
LG UHD 75UP8770
LG NanoCell 90
LG OLED evo G3

Common Causes

T-Con (Timing Controller) board has failed internally
Ribbon cables connecting the T-Con board to the panel have come loose
Oxidation or corrosion on the T-Con board connector contacts
Physical shock or vibration has dislodged internal panel connectors
Panel itself has developed a fault that the T-Con cannot compensate for

How to Fix It

Power the TV off completely and unplug it from the wall for 2 minutes.

A hard reset occasionally clears a temporary P07 caused by a signal timing error rather than a physical fault.
Inspect the screen surface for any cracks, impact marks, or pressure damage.

Panel damage from physical impact triggers P07 and is not repairable — this check tells you whether the panel itself is the cause.
Plug the TV back in and power it on — check if the picture is now normal or still shows lines or distortion.

If picture is normal, monitor for recurrence. If lines or blank screen persist, P07 is a hardware fault needing a technician.
Check the TV warranty at lg.com/us/support using the serial number on the back label.

T-Con board failures within warranty are covered — verify before paying for any repair.
Contact LG support at 1-800-243-0000 and report error P07 for a service referral.

LG authorised centres stock T-Con boards for current and recent models — genuine parts ensure the repair holds.
If out of warranty, ask the technician to reseat ribbon cables before replacing the T-Con board.

Reseating is a low-cost fix — if it resolves P07 it saves you the cost of a new board entirely.

When to Call a Professional

P07 requires the TV back panel to be removed to access the T-Con board and panel ribbons. A technician can reseat connections first — if that does not fix it, the T-Con board will need replacement ($60–$180). If the panel itself is faulty, replacement cost often exceeds the TV's value — the technician should advise you honestly.

Frequently Asked Questions

What does the T-Con board actually do in an LG TV?

The T-Con (Timing Controller) board converts the video signal from the main board into the precise timing signals the panel needs to display each frame. Without a working T-Con, the panel cannot display a picture even if all other components are functioning. It is a small board mounted behind the screen, connected to the panel by thin ribbon cables.

My LG TV shows vertical or horizontal lines — is that P07?

Yes — vertical or horizontal lines across the screen are a classic symptom of a T-Con board fault (P07). It can also indicate loose ribbon cables between the T-Con and the panel. A technician can usually tell from the pattern of the lines whether the T-Con board or the panel itself is at fault.

How much does T-Con board replacement cost for an LG TV?

T-Con board replacement typically costs $60–$180 for the part plus $50–$100 in labour. This is one of the more affordable TV repairs and is usually worth doing on any TV over 43 inches. For smaller or older budget TVs, compare the repair cost to a replacement before proceeding.