Ana içeriğe geç

1.7 GHz dual-core Intel Processor (Turbo Boost up to 2.6 GHz) with 3 MB shared L3 cache

137 Soru Tümünü görüntüle

820-3208-A Board no green light

Hello Guys,

I have a problem that I would like some help with on this 820-3208-A logic board I’m working on. The board looks really clean and there was no water damage,. However, there was some corrosion around U6990 chip and there is no green light on the magsafe. After cleaning the corrosion and replacing the U6990 chip I only get 2.74 V on pins 2 and 4. Pins 6 and 8 both have 15.50V going in. I checked for a short to ground on the pp3v42_g3h and did find a small drop to ground. I then felt around and noticed the SMC is really hot to touch. Please tell me that the SMC is not bad!!!!!

Yanıtlandı! Cevabı görüntüle Ben de bu sorunu yaşıyorum

Bu iyi bir soru mu?

Puan 0
Yorum Ekle

1 Cevap

Filtre ölçütü:
Seçilen Çözüm

Have you checked for corrosion under SMC? That seems like the most probable cause.

Bu yanıt yardımcı oldu mu?

Puan 2

Yorumlar:

Ben is right. Remove the SMC and see if PP3V42_G3H comes back.

tarafından

Thanks Ben, I will check but I'm fairly certain that the smc area is very clean. Just don't understand why I would be getting any voltage at all if there is a short on that line on the smc? I get 2.7V! Dont want to mess with smc if I can avoid it!!!

tarafından

Hey guys is it possible that u5010 (SMC reset-L) is shorted and causing the smc chip to heat up? Still baffling!

tarafından

@Roger What do you get on PPBUS_G3H?

tarafından

Yorum Ekle

Yanıtını ekle

Roger sonsuza kadar minnettar olacak.
İstatistikleri Görüntüle:

Son 24 Saat: 0

Son 7 gün: 5

Son 30 gün: 10

Her zaman: 209