Philips blu-ray model number HTS3106/F7 gets stuck when powering on. I have to shut it off and on several times before it will actually turn on. I've tried unplugging the device and plugging it back it, but it still won't start-up right away. What else can I do? Or is this something that needs to be taken to a shop to fix?

I don't think the people trying to solve this even understand the issue, it won't turn on! How can someone do any of these suggestions where it won't go last the starting mode? So now that you understand the issue try providing another answer. Philips site is useless on anything, that won't even post these systems in their searches.bthey show a bunch of files to download but nothing that mentions the huge problem of so many if their products stuck at starting. Everyone already knows that Philips makes complete junk but for some reason people still buy it or they wouldn't be making anything anymore.
Between Philips and Samsung I'm not sure who uses less metal in their products, everything they make is 99% plastic and uses the cheapest components with the thinnest copper traces on their boards making repairs difficult.
I looked at the components and can't find any obvious bad or burnt items, usually there's a bad capacitor that causes this, but not this time. I suspect it a fatal software error that's not allowing it to start the system. I looked at the Blu-ray laser and it's not even getting power to it at all. So the system has power but the operating system is not starting. It's trying to load and is simply corrupt. Similar to when your computers operating system cannot start. It will just sit there and show a start up screen but never loads and you can't do anything not even turn it off unless you flip the switch or hit reset. I have to unplug mine, if if hit the power button it doesn't do anything or it says standby and won't do anything, it won't even turn off, it just stays on standby and the red light won't even light on the power switch. The light turns red when it's unplugged and back in, then green when it's powered up, then it immediately says STARTING, I left it sit for 30 minutes and it won't do anything. It's junk! Without the ability to reload a new copy of the software there's nothing we can do except stop buying Philips garbage no matter how cheaply they're priced. I would say you get what you pay for but that's simply not true when there are companies like Samsung selling junk at rediculuos prices and people are rushing out to throw their money away. If you disagree with my take on either Philips or Samsung, just wait, you haven't owned it long enough yet to find out how short lived (keep in mind I'm still using an old pioneer premier 7.1 THX 120wpc receiver made in 2003 and a mitsubushi 48" LCD HD TV with the original bulb 10 hours a day use since 2007, Samsung will never last even 5 years) they are and difficult to operate and even more impossible to repair, most issues are software related. I'll bet 90% of functions go unused on Samsung just because nobody has time to try and figure out how to even set them up let alone use it.