Regarding the numbered items:
1. I'm not sure what A/D means specifically but I went ahead and took pictures of the relevant parts of the motherboard and then some. Let me know if higher quality pics are needed or if a specific area needs further attention: http://imgur.com/a/HrYCr
2. I made a recording of the speaker popping noise: http://vocaroo.com/i/s0zyss1Hiprs covers the cycle of turning on the machine (0:06s), the popping (0:18 to 0:25), and then turning it off (0:36).
3. I have a digital multimeter but honestly I have little experience using it and have only the barest idea of what you're asking. I'm a complete novice when it comes to circuitry although I'm trying to improve.
4. Still not sure what the A/D is, but regarding the board itself I hadn't noticed one way or the other about its temperature.
I'll try to clean the board at my next opportunity, but with the holidays fast approaching I probably won't have time for another week or so.
1. I'm not sure what A/D means specifically but I went ahead and took pictures of the relevant parts of the motherboard and then some. Let me know if higher quality pics are needed or if a specific area needs further attention: http://imgur.com/a/HrYCr
2. I made a recording of the speaker popping noise: http://vocaroo.com/i/s0zyss1Hiprs covers the cycle of turning on the machine (0:06s), the popping (0:18 to 0:25), and then turning it off (0:36).
3. I have a digital multimeter but honestly I have little experience using it and have only the barest idea of what you're asking. I'm a complete novice when it comes to circuitry although I'm trying to improve.
4. Still not sure what the A/D is, but regarding the board itself I hadn't noticed one way or the other about its temperature.
I'll try to clean the board at my next opportunity, but with the holidays fast approaching I probably won't have time for another week or so.