Got here as quick as I could.............just a minute, I'm out of breath!
Acer Aspire 5742-6439 product review,http://techwiki.hardwarecanucks.com/product/2MTExNTc4NQ/Acer-Aspire-AS5742-6439-Notebook/#pics
For specifications in case you need them.
Acer Aspire 5742 series disassembly guide,http://www.laptopguides.info/acer/acer-aspire-5742-service-manual/
On this page go down to the bottom of the paragraph, and left-click right on - Acer Aspire 5742 Service Manual.
It works, I'm looking at the Service Manual right now.
Aspire 5742/5742G/5247Z/5742ZG Series Service Guide
[ The above is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.
After you click on the file name ( Acer Aspire 5743 Service Manual), it may take up to 30 seconds, before the first page comes up ]
Not what you had in mind?
Now, may I ask what the problem is? Post back in a Comment.