Sounds like a classic case of capacitance (i.e., oxidation - RUST) introduced in the signal path. You say you have a triple sat (though I would expect you to have a 5-sat with your H20, since HD locals are generally on the 99w or 103w), so I assume your dish has 4 "F"-connector ports. How many cable drops does your setup have? (1 per std IRD, 2 per DVR.) If your setup requires more than 4 drops, you most definitely have a multiswitch employed (unless, of course, you have a cable splitter -- but then that would be the source of your problem).
If you have more than one receiver, SWAP THEM temporarily. Does the problem follow the receiver, or remain with the outlet.
More than 80% of the problems described like yours I have seen were due to moisture in the lines. Using a 7/16" wrench, check all external "F"-connector junctions (barrel adapters, ground blocks, diplexors, multiswitches, power-pass splitters) for visible signs of rust (check both male and female parts). Also check to see that the right connectors were employed and properly installed. It is not uncommon to roll to a job and see that some technician tried to force an RG-6 connector onto an RG-59 cable (actually, RG-59 should not even be used), or a standard (dual shield) connector onto a tri-shield or quad-shield cable. Ofttimes the right connector would be used but the installer "forgot" to compress the fitting. I rarely see weather boots employed.
There is a good chance that your problem may be fixed without a ladder, but it also could be a bad connection topside.
Regardless , connectors (I STRONGLY recommend PPC compression type) and compression tools do not come cheap. You will also need a cable prep tool (do not use a utility knife, please). The investment is substantial for one-time use. It might be more beneficial to put in a service call, but it helps if you know what the real problem is before the tech arrives. I've seen to many erroneous equipment swaps (hurting all parties involved: customer, company, and technician). Make sure rubber weather boots are used!!!