VU+ Duo intermittend not responding to controls

W

woodyboy

Vu+ Newbie
My VU+ Duo (26 month old) has a problem that it does not respond to the the remote control neither to the front jog dial. Most of the time the problem starts direct after booting or about 1 minute after booting. Sometimes after a random time, the remote and the jog dial are operates again while the box is running. It can be an hour or 30 minutes, mostly to long to wait.
While the box is not responding to the controls, it plays very well the satellite stream. But the only thing I can do is operate the powerswitch on the back, it's the only control the box shows great obedience;)

Anyone any idea?

I measured the voltages on the powersupply. Only the 5.5 Volt is low, i measured 4.97Volt. The other voltages from the PS are closely to written values on the PS.
 
What image are you using ?

Do you have any usb or hdd connected ?

Are you using a swap file ?

Is there any spinner on the screen when the remote / jog dial is not working ?
 
Thanks for your reply!
I have tested with Open PLI V3 and V2 (last release end dec 2011) also the latest VTI. All with the same result. So I think it is the hardware. The problem has started on the hot days last summer. But nowadays it is most of the time that the box is not responding.

Currently I've disconnected the harddisk, same status. No change if the HDD is connected.
I've never a swapfile configured explicitly.
As a wrote the picture on the selected broadcastchannel is not affected. On the screen nothing happened when the controls do their job or not. EPG updates etc are executed, subscriber card is updated. It looks that the box is running fine. Except there is no controle possible.
The Led on the frontdisplay shows the remotecontrol is transmitting when a button is pushed.
Yesterday, when the cover was off, the powersupply whistles, when a butten pressed the frequency changes.

Can somebody check the voltage of the 5,5V Powersupply output. Is the output 5,5 or 5V? It is the second pin on the large connector between the PS and the MB seen from the backsite of the box.
 
Ok for now, my only advice would be to reflash the box with the lastest bootloader again, and then install the latest offical vu+ image (which you can find on vu+ own website).

And then see if you suffer the same problems.
 
I succeeded to reflash the bootloader and the original vu+ image from today. It has operated for about an hour . Then I switched the box to standby and the clock appears on the display but the tv set showed an white box for about 2/3 of the screen in the left upper corner. The box would not awake. So switched off the box. The box restarted, but no controls are functioning.
Reflashed the bootloader with the latest Black Hole image, also no controls are functioning
Reflashed the bootloader and the original VU+ no controls functioning.

Anyone an idea? I investigated the power supply and reversed engineered the 5V powersupply. According to the components it should deliver 5V. So I am curious if somebody can confirm that 5V is ok and the 5.5V is a misprint.
 
Thanks, I was in doubt to exchange C807 because the Voltage on the regulators is ok. I exchanged the cap and no luck, the cap has the capacity it has to have. I soldered another one on the board and the symptoms are the same. The first two minutes the remote is working well and after that the STB is deaf.
 
@ woodyboy

Try to change electrolit C807. It is first. It is easy and have not any dangers.(for the person who knows with soldering iron)
 
exactly the same symptoms... but I know the reason, too. The power cable from HDD falled down, and contaced the front PCB board, behind the display(I thin only the isolation). At that moment blue screen. So turned off...wait 5min, turn on, and while the RC not working and the RC LED on the display not blinking. So I put there a newer firmware (1.7.9), and everithing was ok. RC working, so I scanned for channels, configured everithing, installed (cam soft). At that moment I see channel, but the RC was not working. If I even run vucamd, or (other cams) for supporting the card, then the RC will die. The screen is ok, but the RC is gone.

You can use the box, with HDMI-CEC RC, or with the web interface.
 
@zano sano
Thanks for your reply and observations. I understand that you state that when you installed the cam the RC ceased working. I didn't check if that also happened with my duo. The problem started on hot summerdays, and not due to mechanical interventions. I didn't check if the box obbeyed to the CEC or web interface. The box is back to its package box. I bought a new one and wait for some time to do a more intensive analytic root cause. Maybe it is a bad soldering in the RC signal path.
 
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