Replacement youview box - poor sound and vision

[samser]

Youview box was replaced as it no longer recorded successfully, though picture and sound was good. Installed replacement box and for a short while all looked good. After around 10 minutes picture was increasingly pixellated and sound poor also. Checked settings and found 100% quality initially but reduced to 70%, hence problem. Have spoken to Talktalk but not received an answer that has solved it. Checked quality on old box -100% consistently

[fre55die]

@samser 

Have you tried a Maintenance Reset option 2 which will keep your recordings as follows :

Maintenance Reset Option 2 (Keep Recordings)

Turn the box off, then unplug the power lead for about 10 minutes.

Re-plug in power  lead.

1. Ensure the YouView Box is switched off and is currently connected to the router (the YouView Box will require an internet connection).
2. Power on YouView using button at the back of the YouView Box.
3. Start YouView using the power button on the YouView Box front panel and then quickly press and hold both the + and – buttons on the front panel. If you haven’t pressed the buttons together by the time 'YouView Waking Up' is displayed, or you see the 'YouView please wait...' message then try again.
4. Let go of the + and – buttons once the 'Huawei – Maintenance Mode menu' is displayed.
5. The + and – buttons on the front panel will navigate the menu. Keep pressing the – button until 2  “factory reset keep recordings” option is highlighted.  If you go past the option, simply press the + button to navigate back to the option.
6. Press the power button on the YouView Box front panel to select the option. This will bring up some information and ask 'Do you want to proceed?'. Press the power button again to confirm.
7. The YouView Box will now show a progress bar as it downloads software from the internet and installs on the YouView Box. This may take several minutes. Once complete, the YouView Box will restart.
8. Once the YouView Box restarts, the YouView Box will show the initial setup wizard. You will need to run through the setup wizard including tuning the channels.

You will then need to reset your personal settings (such as parental controls / ANTENNA OUT / Surround Sound etc.) and also probably reset your scheduled recordings (It might be worth taking a note of future recordings before doing this so you don’t miss any).

It is also a good idea to restart your router once you have done this.

If you do NOT have any recordings that you want to keep :

Blue YV /Menu button on the remote  >  Settings  >  Factory reset. This option will re-format the hard drive and reinstall the system on your box and you will lose all recordings.

Again It is also a good idea to restart your router once you have done this.