MacBook Pro A1708 No sound/audio, sound card is not showing up in the system repair: Difference between revisions
From Repair Wiki
More actions
(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== When A1708 is not playing audio and the audio device is not showing up in the system thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it! ==Symptoms== *No audio out *Sound card not showing up in the system ==Solution== It could be a chipped off R2041 on the backside of the CPU, so no AUD_PWR_E...") |
No edit summary |
||
| Line 1: | Line 1: | ||
{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=MacBook Pro A1708 | ||
|Affects parts= | |Affects parts=Motherboard | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station | ||
|Type= | |Type=Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
{{stub}} | |||
==Problem description== | ==Problem description== | ||
When A1708 is not playing audio and the audio device is not showing up in the system | When A1708 is not playing audio and the audio device is not showing up in the system | ||
Latest revision as of 10:12, 27 October 2023
| MacBook Pro A1708 No sound/audio, sound card is not showing up in the system repair | |
|---|---|
| Device | MacBook Pro A1708 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
This article is a stub. You can help Repair Wiki grow by expanding it
Problem description
When A1708 is not playing audio and the audio device is not showing up in the system
Symptoms
- No audio out
- Sound card not showing up in the system
Solution
It could be a chipped off R2041 on the backside of the CPU, so no AUD_PWR_EN on L6361 and therefore only 0.3 V on L83_1V8 for the U6300 chip. Installed new resistor and sound card shows up.
You may want to check these four main ICs responsible for sound on the 820-00840/00875 boards U6200/6300/6400/6420. Compare diode mode reading with known good board in regard to these ICs. Also refer to schematic and check VIN, enables, data lines (U6400/6420 AUD_I2C_SDA/ AUD_I2C_SCL) etc. Check values of all resistors associated with these four ICs (refer to schematic for values)