More actions
| MacBook Air A2337 No sound from speakers repair | |
|---|---|
| Device | |
| Affects part(s) | |
| Needs equipment | |
| Difficulty | |
| Type | |
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Problem description
Issue with MacBook Air A2337 not playing sound from speakers.
Symptoms
- No sound from speakers
- Not a software issue
Solution
Diagnostic Steps
Check SPKRAMP_1V8_RESET_L
You should measure 1.8V, if you measure 0 volts, proceed to the repair steps below.
Repair Steps
No or low SPKRAMP_1V8_RESET_L
- UR900 is most likely the issue.
- Run wire from CR901 pin 2 that has 1.8 volts to pin 1 of CE904 this will force SPKRAMP_1V8_RESET_L high and allow speakers to power up.
Note: As of writing I could not find UR900 (SN74AVC4T234) for purchase it is recommended you replace UR900 but this workaround works fine so far assuming UR900 is being told to turn on and SPKRAMP_RESET_L is present.