We're experiencing a runaway heat problem with the DM8169 and DM8168. We're measuring at the heat sink and the temperature on some units will slowly creep up to about 75 C. Then after some time the processor will lock up (we get a black video output or no video and the processor stops running) and the temperature will shoot up to over 100 C. We only see this behavior on a few units, but it's a consistent problem for our customers. On units that are working the typical temperature at the heat sink is about 54 C.
Is there a heat problem with the DM8168/9? Is there a solution to this problem?