car stereo not turning on

[Porto]

Hello,

For 2 years already I have here a car stereo laying around which won't turn on anymore.
It's a 1-din, China made no-name thingy with a 7" foldable touch display, which in whole worked quite good!

The standby LED is lit when on 12v power but it won't go out of standby.
The switch itself is working.

Is this a classic case of a malfunctioned cap you think?

Thanks in advance.

[wraper]

Rather dead flex. Capacitors do not die very often in such situation, this is not PC monitor. And not with such kind of defect.

[Porto]

Thanks for the reply.

I haven't check the flex yet so I'll do that. 

[aargee]

I know this is an obvious question but you do have both the main 12V (IGN) and the Acc 12V connected to 12V?

[Psi]

Bad caps would definitely be something i would suspect.

I've seen brand new PC motherboards where all of the caps have leaked after being sit on the shelf for 6 months.  (zero use, just sitting on the shelf).

Really bad electrolytics will swell up and leak from ambient temp!!

[Falcon69]

if it is an older model, you may need to connect the emergency brake wire.  The older models would not turn on the displays (for fear of operating a dvd movie in drivers view) in the US unless that wire was connected.  I can't remember if that wire needed to be grounded or a shift from ground o +12 volt pull-up, or just connected to +12v pull-up.  need to check the install instructions.

[Porto]

Hi,

yes, both constant 12v and ignition 12v are connected. It didn't work one day in the car where it did work the day before.
After that I tried on the workbench with a 13.8v power supply but it just stays on standby.

It is not only the display which is not turning on, it's the whole radio.
Maybe the current is first supplying the display, via the flex, and than the tuner itself, so it already blocks at the
display not getting power?!

There are no eletrolytics in there, only SMD. It's not a very old radio, it has navi, BT, DVD etc
I just found a brandname, it's a Meos MC701B, year 2008... never heard of it though.