Panasonic TH-42PX600B no clock and EPG issues

[mattlumb]

Hello All, weird one this.  I've got a plasma which had lost it clock and has much of the EPG data missing. Although everything else works as normal, finds all DVB channels but there is no time scale on the EPG horizontal bar and no time display in the top right corner on EPG. The clock issue was intermittent but has now gone completely. I have the service manual but it's not much use for diagnosing this one, same in service mode.

Thanks in advance,

Matt