Hi Mac25,
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I see that you dv4 was working fine and after you let it go into sleepmode it will not restart, but you see blinking or flashing lights. Here is a document that may help. Computer Does not Start (Windows 7, Vista, XP)
If you choose you can call technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region. HP Technical Support Sitemap.
They may have other options available for you.