I'm new to board repair so bear with me. Just my luck that this is my first.
This board likely had work done before. It was probably ultrasonic'd because it's pretty clean. The SMC had its underfill removed so someone probably reflowed or replaced (doubt) it. Pictured: Near the SMC the traces of Q5490 for pins 4 (PPDCIN_G3H_ISOL) and 2 (PP_SLP_SUS_L) are somewhat exposed.
It's stuck in S5 and missing PM_SLP_SUS_L (shorted) although I don't think that exposed trace is the problem, may have been the last person being lazy for a reading? Anyway, is this a dead CPU? As I'm a beginner I don't have an oscilloscope
From other threads, I measured
PP3V3_S5
PPVRTC_G3H
PM_BATLOW_L
PM_DSW_PWRGD
PM_PWRBTN_L
SMC_ADAPTER_EN
PCH_SRTCRST_L
PCH_INTVRMEN
PCH_DSWVRMEN
PCH_INTRUDER_L
RTC_RESET_L
which are all normal afaik.
PM_RSMRST_L is 0 because PP3V3_SUS is 0, because P3V3SUS_EN is 0 and is short, but since EN comes from SLP_L through R8190 (0 ohms) is SLP the short and therefore the CPU? Or maybe a short trace?
Edit: I'm editing as I go along. I found that PM_PCH_PWROK is 0 but isn't short. I don't think this explains the SLP short though.
Not sure if this is related but S5_PWRGD is only 2v.
Also please give me tips in general if you're willing!
This board likely had work done before. It was probably ultrasonic'd because it's pretty clean. The SMC had its underfill removed so someone probably reflowed or replaced (doubt) it. Pictured: Near the SMC the traces of Q5490 for pins 4 (PPDCIN_G3H_ISOL) and 2 (PP_SLP_SUS_L) are somewhat exposed.
It's stuck in S5 and missing PM_SLP_SUS_L (shorted) although I don't think that exposed trace is the problem, may have been the last person being lazy for a reading? Anyway, is this a dead CPU? As I'm a beginner I don't have an oscilloscope
From other threads, I measured
PP3V3_S5
PPVRTC_G3H
PM_BATLOW_L
PM_DSW_PWRGD
PM_PWRBTN_L
SMC_ADAPTER_EN
PCH_SRTCRST_L
PCH_INTVRMEN
PCH_DSWVRMEN
PCH_INTRUDER_L
RTC_RESET_L
which are all normal afaik.
PM_RSMRST_L is 0 because PP3V3_SUS is 0, because P3V3SUS_EN is 0 and is short, but since EN comes from SLP_L through R8190 (0 ohms) is SLP the short and therefore the CPU? Or maybe a short trace?
Edit: I'm editing as I go along. I found that PM_PCH_PWROK is 0 but isn't short. I don't think this explains the SLP short though.
Not sure if this is related but S5_PWRGD is only 2v.
Also please give me tips in general if you're willing!
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