Fried HDHomeRun

[Kerkana]

Hello,

There was a thunderstorm a little while ago and my HDHomeRun HDFX-4DT fried. Would it be possible to get the part number for this chip so I can replace it?
It was located right next to the RT7273GQW, which also fried.

Thanks.

[nickk]

IC7 - Richtek RT9081AGQZA

Suggestions:

1) Checking IC2 RT7273GQW:
Check +12V is reaching the input caps - C7, C8, and C9.
Check all 3 outputs. Easiest is to check L2 (1.8V), L3 (1.15V), and L5 (3.3V). If 1 or 2 rails are working it may be a short downstream on one rail rather than the IC that is gone.

2) Checking IC7 RT9081AGQZA:
Pin 6 (or C19) is VIN and should measure 1.8V.
Pin 3 and 4 (or C88) powers the silicon inside and should measure 3.3V.
Both of these rails are required for this IC to power up and both come from the RT7273GQW.
Once you have 1.8V and 3.3V, check pin 1 (or C90) for 1.35V (VOUT from this regulator).

[Kerkana]

Thanks for taking the time to reply, I'll take the measurements once I have the time and will post an update here