I can't edit the title, but I got this board mixed up with another one (very similar). This is also an 820-3330 board.
Symptoms:
1. Board won't detect hard drive; doesn't show in EFI, and flashing folder appears.
2. Drive gets power; I can hear the whine of the drive being powered, but no "ticking" (data). When I disconnect power, I can hear the typical click-off of drive.
3. Pin 7 of U4510 is 3.3v
4. C4510 and C4511 both look like they've seen significant heat/draw (not shorted, but darker-yellow on the end caps than others)
5. Board boots to USB drive fine; WiFi, BT, Audio, etc., all work.
6. Drive not detected in disk utility or System Info, of course.
7. All resistors measure out fine around U4800/U4510, etc.
So I suspect some issue with the data connection. I replaced U4510, C4510 and C4511, but no dice. There are lots of data lines related to J4501, so unsure which others I should be looking at.
Symptoms:
1. Board won't detect hard drive; doesn't show in EFI, and flashing folder appears.
2. Drive gets power; I can hear the whine of the drive being powered, but no "ticking" (data). When I disconnect power, I can hear the typical click-off of drive.
3. Pin 7 of U4510 is 3.3v
4. C4510 and C4511 both look like they've seen significant heat/draw (not shorted, but darker-yellow on the end caps than others)
5. Board boots to USB drive fine; WiFi, BT, Audio, etc., all work.
6. Drive not detected in disk utility or System Info, of course.
7. All resistors measure out fine around U4800/U4510, etc.
So I suspect some issue with the data connection. I replaced U4510, C4510 and C4511, but no dice. There are lots of data lines related to J4501, so unsure which others I should be looking at.
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