A2681 820-02536 no Wi-Fi

iMuhtaseb

Senior Member

Join Date: Jan 2017

Posts: 122

Country: Palesine
#1

A2681 820-02536 no Wi-Fi

12-16-2024, 09:23 AM

the board came with no power symptoms and found a blown cap (if I remember correctly it was PP3V3_S2_LDO line)
after cap replacement Wi-Fi is not turning on.. after few reads found "WLBT_PWR_EN" high in diode mode and not present when board is on.. thought PMU is faulty, replaced it but sadly Wi-Fi is not on as it is.. meaning this is a bad Wi-Fi chip.. and since Wi-Fi chip is paired to the M2 SoC changing the chip is meaningless..

all wifi chip vcc lines are on = 3v3 aon wlbt, 1.8v s2 and 1.25v s2

Is there other workaround for this issue?

Last edited by iMuhtaseb; 12-16-2024, 09:51 AM.
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iMuhtaseb

Senior Member

Join Date: Jan 2017

Posts: 122

Country: Palesine
#2

12-17-2024, 02:29 AM

WLBT_PWR_EN is a 1.8v line.. can I pull volt from 1.8 s2 to the power enable line?
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A2681 820-02536 no Wi-Fi

A2681 820-02536 no Wi-Fi

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