Philips TV 'No Signal' — How to Fix It

What it means

'No Signal' (sometimes 'No Signal — check your cable' or 'Weak or no signal') means the Philips TV is on the right kind of input but isn't receiving a picture from it.
The usual reasons are simple: the TV is set to the wrong HDMI port, a cable has worked loose, the device plugged in is asleep or off, or — for aerial channels — the antenna or cable feed isn't connected or needs retuning.
It's almost always a connection or input problem, not a fault with the TV.

Affected Models

Philips OLED series (OLED808, OLED908, OLED+ models)
Philips The One (PUS8xxx series)
Philips PUS7xxx and PUS6xxx LED models
Philips Ambilight Android TV and Google TV models
Older Philips Saphi-platform Smart TVs

Common Causes

TV set to the wrong source/input (HDMI 1 vs HDMI 2 vs TV/aerial)
HDMI, aerial, or AV cable loose at the TV or at the device
Connected device (set-top box, console, Blu-ray) switched off or in standby
Faulty or cheap HDMI cable, especially for 4K/120Hz signals
Aerial or cable feed not plugged in, or channels not tuned in
HDMI handshake glitch after a device or TV was power-cycled
Wrong HDMI mode setting (e.g. an older device on a port set to 'HDMI Ultra HD')

How to Fix It

Select the right input.

Press the Source or Input button on the Philips remote (or open the Sources menu) and pick the input your device is actually plugged into — HDMI 1, HDMI 2, and so on.
If you're watching aerial channels, choose 'Watch TV' / the antenna input.
Getting the wrong port is the single most common cause.
Reseat the cables.

Unplug the HDMI (or aerial) cable at both ends — the TV and the device — and push each end firmly back in until it's seated.
Try a different HDMI port on the TV.
If you have a spare HDMI cable, swap it in; a failing or low-quality cable causes intermittent 'No Signal', especially with 4K sources.
Check the source device is awake.

Make sure the set-top box, console, or player is actually switched on and not in standby — its own light should be on and it should respond to its own remote.
If it's a streaming stick plugged into the TV's HDMI, confirm it has power (some need the supplied adapter, not the TV's USB port).
Power-cycle everything (HDMI handshake reset).

Turn off the TV and the connected device, and unplug the TV from the wall for 60 seconds.
Plug the TV back in, turn on the source device first, then the TV, then select the input.
This clears a stuck HDMI handshake — a frequent cause after either box was rebooted.
Retune channels (for aerial/cable TV).

If 'No Signal' is on the TV/antenna input, go to Settings > Channels (or Installation) > and run a channel search/retune.
Check the aerial lead is firmly in the TV's RF socket and not damaged.
If only some channels are missing, it's likely a retune; if all are gone, check the aerial connection or splitter.
Try the device on another TV / port setting.

Still nothing? Plug the device into a different TV or monitor to see whether the device or the TV is at fault.
If an older device only fails on one HDMI port, check that port's HDMI mode in Settings > General — switching it from 'HDMI Ultra HD / Optimal' to 'Standard' often fixes older sources.
If the TV shows 'No Signal' on every port with known-good cables and devices, contact Philips support.

Frequently Asked Questions

Why does my Philips TV say 'No Signal' on HDMI even though the cable is connected?

Most often it's the wrong HDMI port selected — the cable is in HDMI 2 but the TV is showing HDMI 1.
After that, the usual culprits are a sleeping source device, a stuck HDMI handshake (fixed by power-cycling the TV and the device in the right order), or a marginal cable.
If you have a 4K device on a Philips port set to the high-bandwidth HDMI mode and it still says 'No Signal', try switching that port's HDMI mode to Standard — older or lower-bandwidth devices can't cope with the Ultra HD setting.