Most players nowadays dont have a power button to switch off. You just press and hold the SRC or Source button until it switches off or on. That's the common way for aftermarket players.

Ok, pioneer what model?

Don't have manual?

What about holding down the mode button?

how come it don't have..usually there's a setting that u can turn off demo..by turning off the demo...it won't show anything..standby mode

U believe in such nonsense de a?
Does ur unit comes with GPS? If yes, it may be showing the GPS system instead.

So when you hold down the Mode button after Source is off, it displays a white screen instead?

could be a faulty unit..

seems like a good HU

You main tekan until it hang kah?

Come TT let the club HU master play play and see..

I think this unit cannot power off the display at all.
For the mode, using mode also can access to the navigation screen.

Holding the Mode or SRC button in any situation will switch it off. The white screen that was displayed could mean a firmware issue with the player that can only be fixed by totally cutting power supply to the HU, and then reconnecting again (reset). I suggest you go back to the accessory shop that you bought it from and ask them to test the same thing you did with a similar model. If the same thing happened, check the firmware version. If the white screen doesn't show on the other unit, it's a problem with your unit.
Dei. I checked the link to see if it's working lah before creating the thread.. Apadah...
Prob is he said he tarak navigation.

What I meant was, when the screen went white, the only thing you can do to fix the situation is to turn the keys, correct? When you turn the key to off, it disconnects power to the HU. But when you turn the key to ACC, the power reconnects again, then the white screen prob miraculously solved itself. Firmware you can check on the HU box, or under the Settings tab. I know for my Kenwood dual din, the firmware can be checked through that.

actually it is off...
pioneer got dis thing call demo mode that u can turn d feature off when the HU is off...
when d HU is off...u can go to the HU settings to off demo mode

cant update firmware to solve issue?

Since last year started nia.

Dunno. Zapdos in charge leh.

Too less ppl bulking.. So buying retail instead.