Hello! I would really appreciate if anybody could advice me, what should I check and do in a following situation. Notebook Acer Aspire 5742g, a little older than a year, turns off without any errors a little time after starting, usually around 5-10 minutes. If I start it again immediately afterwards, then working time decreases to 3-5 minutes, on the next try it hardly loads. All temperatures are normal, cooling system is ok - there is a grease and it's bolted right. It doesn't depend on os and type of stress - all the same thing happens even in BIOS utility. Futhermore, BIOS utility freezes when i try to exit and save settings, they are however saved. Also nothing changes if I try to start with disconnected USBs, modem, WiFi, hdd; niether with any of two RAM modules. Visual examination of capacitors hasn't helped - everything looks rather normal. Thanks in advance for any advice!