A customer send me Acer Aspire 5742G with Intel Pentium P6100, 4GB DDR3 and GeForce GT420M. Problem - not powering on, not charging. I found no 3VALW and 5VALW as well. First I tried flash BIOS and EC which I had from before. No change. After some hours of searching I found problem on power comparator PU18 LM393 and some oxidated parts near this IC. After changing PU18 and reflowing oxidated parts laptop works again ![Cheers](https://cdn.badcaps-static.com/images/smilies/cheers.gif)
Could help to somebody..
![Cheers](https://cdn.badcaps-static.com/images/smilies/cheers.gif)
Could help to somebody..
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