Thread: explorer 8300hd problem ...help please!

I am new on this site and hope that someone can help me with my problem. I have a explorer 8300hd+ pvr which I have owned for almost 2 years (cable subscriber) . The pvr has worked fine till last month . Now what has happened is that wether I am watching live or recorded shows there are constant freezes on the image and sound (only lasts a split second but is recurring). This does not happen on all my channels (all the hd channels work fine). I have tried a regular hd box on my tv and every channel works fine. The signal strength varies between 3 to 7 dbmv the s/n is 37. I thought the internal hard drive was the problem so i switched it. However no luck the problem is still there! Can anyone help me with this problem (pvr is no longer under warranty). Thank you in advance for you help.