Jason SB442R3 only pertains to a jittery pix while playing Progressive Scan DVDs or when certain brand DTV Receivers are connected to the Video 5 Input. Is that the problem you are having? You might be more interested in SB484R2 which pertains to No Pix when first turned on and Standby LED blinks 5 times. I will e-mail you this Service bulletin. As far as removing the "A" circuit board. The "A" board is the main board and will require using both hands and will be very difficult through a small hole. I will try to e-mail you the OEM Service Manual but it's quite large (22MB) so I'll have to send it in a few attachments. If you do receive it successfully check the Self-Diagnosis on page 4 and check the dissassembly instructions beginning on pg 36. Eric

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