Too much current being drawn - fault somewhere in electronics - probably not power supply - difficult to resolve without test equipment and schematics unless you get very lucky - inspect inside and look for obvious fault 1000:1 chance. Might be best to buy new unless you can invoke warranty.
Peccavi
June 2009
I can answer this question...
my thompson dt6300 keeps blowing the 1.25 amp internal fuse?
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Try fixfault.com to fix dtt receivers.