Welcome to the Community and thanks for posting on the Forum Sorry to hear that you have been experiencing poor picture quality on Channel 4 and 5. Are you still having this issue?
I have been able to access your account via your Forum details and run testing to your equipment. Testing shows a possible issue with the TiVo®, however, I have sent new signals to the box to see if we can clear this up for you. If you could please reboot your TiVo® for me.
Please let me know how you get on with this and if this improves your channels.
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Thanks for taking the time to get back to us about this, I'm sorry again for the inconvenience this problem is causing.
As you're still experiencing this issue I'd like to arrange for an engineer to take a closer look if you're available? I've sent you information regarding this in a private message, you can view that message by clicking the red envelope on the top left of this page.
I'm sorry again for these issues, we're looking forward to getting them resolved as soon as possible.