lenovo g460 auto shutdown

[bigbily09]

i have here a lenovo g460 la-5751p motherboard the problem is it shutoff when booting to windows logo, i tried replace cpu and re-thermal paste and pad,increase fan speed, ram, harddrive, reflash bios ic, charger replace but still the problem exist what should be the problem, please help last time it boots to windows but it shutsdownrandomly but now it doesnt enter to desktop windows now on logo it shutoff already

[mcplslg123]

Re: lenovo g460 auto shutdown

Disconnect all peripherals like keyboard,wifi,bluetooth etc. Does it randomly shutsdown in bios setup??

[bigbily09]

Re: lenovo g460 auto shutdown

Disconnect all peripherals like keyboard,wifi,bluetooth etc. Does it randomly shutsdown in bios setup??

when in bios it doesnt shutoff but when in windows it shutoff, with or wthout the battery/wifi card/dvd/keyboard it shutoff on windows

[bigbily09]

Re: lenovo g460 auto shutdown

up please help

[bigbily09]

Re: lenovo g460 auto shutdown

up please someone help me what should i voltage check

[mcplslg123]

Re: lenovo g460 auto shutdown

Its difficult to help on such cases online. One needs the mb physically as there is so much to check. If you have DSO, check communication on SDA/SCL lines of memory slot & PCH. I doubt something is wrong in ram circuit but cant say with absolute sureity.