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| Α1466 (820-00165-02) No fanspin,doesnt turn on https://vlab.su/viewtopic.php?f=51&t=108671 |
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| kosmo555 [ 03 ноя 2020, 13:12 ] | |
| Заголовок сообщения: | Α1466 (820-00165-02) No fanspin,doesnt turn on |
Hello, this motherboard had a low resistance in L7520 caused of Q7520 i replaced it and its ok now, i also replaced U7501. with io cable installed (J9500) i have only in (L7560 PPDDR_S3_REG_R 3.3V) and i dont have P5VS4RS3_EN , i removed all the coills one by one to see where is the problem and when i lifted (L7430 PDDR_S3_REG_L) and removed (J9500 without io cable installed) i had voltage in (L7520 PP5V_S4RS3 5V) (L7630 P1V05S0_LL 1.0v) and ((L7560 PP5V_S4RS3 3.3V) i checked all power rails and PP1V2_S3 is missing also PP0V6_S0_DDRVTT is missing.all other is ok,i checked for short and all looks ok. also with removed coil in L7430 the one side PDDR_S3_REG_L gives 2v and PPDDR_S3_REG_R 0v i replaced U7400 and still the same.i also noticed that after long time it warms up in the spot i marked in the photo i uploaded.any ideas? :/ |
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| andriyd1 [ 09 ноя 2020, 06:10 ] | |
| Заголовок сообщения: | Re: Α1466 (820-00165-02) No fanspin,doesnt turn on |
Resistance on PP1V05_S0 and PPVCC_S0_CPU?? |
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| kosmo555 [ 09 ноя 2020, 16:48 ] | |
| Заголовок сообщения: | Re: Α1466 (820-00165-02) No fanspin,doesnt turn on |
PP1V05_S0 resistance with ground 206(001 is ground) and PPVCC_S0_CPU resistance with ground 003 |
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| andriyd1 [ 09 ноя 2020, 18:54 ] | |
| Заголовок сообщения: | Re: Α1466 (820-00165-02) No fanspin,doesnt turn on |
Double check this, PPVCC_S0_CPU resistance with ground 003, that's too low. Normal resistance should be 20-100 ohm. If it's that low likely bad CPU. |
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