Hello
I've got two W530 boards, one with K1000M and one with K2000M graphics card. The first one had an issue of turning off under heavy CPU load after about 30 minutes or in idle. GPU load wasn't causing it to shut down. Trying to turn it back on would only make the power LED to come up for about 2 seconds without fan spin or thinklight flash, and that's it. It also wasn't charging the battery after it died.
Gently pressing the laptop in left upper corner would fix this problem for a couple of days.
The latter is completely dead and has the same 2-second power blink, nevermind pressing or bending the board. I bought it like this.
VCore of about 1,5V is present for a brief second on the CPU inductor while pressing the button on both boards. CPUCORE_PWRGD and VCORE_ON rails are missing on voltage controller near docking port (only milivolts there)
I thought that it can be the problem with one of VT1326SF reugulators, but I couldn't tell which one since they're all connected to the same output. There's also -TS-FAULT1 rail set to high(?) with around 3V on it. It's common between all 3 VT regulators. So I took out the K1000M board and tried to melt the BGA balls underneath the regulators. If pressing the magnesium housing really helped I thought it's a problem with balls. Unfortunately, it didn't help, and after this operation, the first board became dead too, so that gave me an idea, that the problem really lies in those VT regulators.
I ordered 6 vt1326sf chips and I plan on replacing them, but I want to be sure. Is there anything else I can check? Was my diagnosis proper? Is there a way to tell which of the three regulators is faulty, or I should just replace all of them?
I've heard, that those regulators are common problem in 30 series and connected to my symptoms, but I've never seen a post on the internet with a proof or confirmation, that replacing them actually helps.
I've got two W530 boards, one with K1000M and one with K2000M graphics card. The first one had an issue of turning off under heavy CPU load after about 30 minutes or in idle. GPU load wasn't causing it to shut down. Trying to turn it back on would only make the power LED to come up for about 2 seconds without fan spin or thinklight flash, and that's it. It also wasn't charging the battery after it died.
Gently pressing the laptop in left upper corner would fix this problem for a couple of days.
The latter is completely dead and has the same 2-second power blink, nevermind pressing or bending the board. I bought it like this.
VCore of about 1,5V is present for a brief second on the CPU inductor while pressing the button on both boards. CPUCORE_PWRGD and VCORE_ON rails are missing on voltage controller near docking port (only milivolts there)
I thought that it can be the problem with one of VT1326SF reugulators, but I couldn't tell which one since they're all connected to the same output. There's also -TS-FAULT1 rail set to high(?) with around 3V on it. It's common between all 3 VT regulators. So I took out the K1000M board and tried to melt the BGA balls underneath the regulators. If pressing the magnesium housing really helped I thought it's a problem with balls. Unfortunately, it didn't help, and after this operation, the first board became dead too, so that gave me an idea, that the problem really lies in those VT regulators.
I ordered 6 vt1326sf chips and I plan on replacing them, but I want to be sure. Is there anything else I can check? Was my diagnosis proper? Is there a way to tell which of the three regulators is faulty, or I should just replace all of them?
I've heard, that those regulators are common problem in 30 series and connected to my symptoms, but I've never seen a post on the internet with a proof or confirmation, that replacing them actually helps.
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