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Versione corrente di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged components, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present,  PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" Unibody

Stato:

open

Risposta Accettata:

226087

Modifica di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged components, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present,  PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" Unibody
MacBook Pro 15" Unibody

Stato:

open

Modifica di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged components, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present,  PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" A1286
MacBook Pro 15" A1286

Stato:

open

Modifica di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged components, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present,  PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" A1286 2009
MacBook Pro 15" A1286 2009

Stato:

open

Modifica di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged componentscomponents, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present, PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks
I got stuck with a board 820-2330 no water damage, no visual damaged componentscomponents, excellent physical condition. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present, PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" A1286 2009

Stato:

open

Post originale di: tol4o ,

Titolo:

820-2330 main rails voltages nighmare

Testo:

I got stuck with a board 820-2330 no water damage, no visual damaged components. Did not have green light, PP3V42_G3H was shorted. The problem was U5727 which I replaced. Got the PP3V42_G3H back and green light on, but still not turning on. PPBUS_G3H was present, PP3V3_S5 was present but PP5V_S3 was missing. So I decided to replace U7201. After that, I lost the green light even when PP3V42_G3H was still present,  PP5V_S3 was still missing and on top of that I lost PPBUS_G3H /not completely but it's only 1.7-1.8V/. This board for some reason has very complicated 1-wire circuit. I'll appreciate any tips. Thanks

Dispositivo:

MacBook Pro 15" A1286 2009

Stato:

open