Mac Mini won't wake up

I've had my mini for about 3 months and it worked great plugged into my Samsung 52" display with Logitech wireless mouse and Kensington wireless keyboard.
Recently the mini has stopped waking from keyboard or mouse activity. Once in this mode, the LED on the front continues to pulse, but does not output a video signal. The only way to recover from this state is to hard power down the unit by holding the power button. Upon restart, the unit takes about 15 minutes to fully recover. It spends a small amount of time at the blank white screen and then spends the next 10-15 minutes on the blue screen. After this, it eventually recovers and allows me to use it.
If I perform a regular reset once the unit is responding, it still is taking the 15 minutes to reboot. Additionally, if I let it go to sleep, I must perform the entire forced shutdown again.
I performed the SMC and PMU resets with no luck.
Are there any logs or utilities I should be looking at?
Is it time to take this thing in for repair?
Here is a recent log of the minis ups and downs:
11/6/08 6:55:20 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
11/6/08 6:55:20 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
11/6/08 6:55:20 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
11/6/08 6:55:36 PM org.ntp.ntpd[14] Error : nodename nor servname provided, or not known
11/6/08 7:00:35 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[74]) Exited: Terminated
11/6/08 7:01:16 PM KeyboardSetupAssistant[98] writeKeyboardType <1166-1241-0> 40
11/6/08 7:01:16 PM KeyboardSetupAssistant[98] writeKeyboardType <259-4711-0> 40
11/6/08 7:07:40 PM com.apple.launchctl.System[2] fsck_hfs: Volume is journaled. No checking performed.
11/6/08 7:07:40 PM com.apple.launchctl.System[2] fsck_hfs: Use the -f option to force checking.
11/6/08 7:07:42 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
11/6/08 7:07:42 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
11/6/08 7:07:42 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
11/6/08 7:08:52 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
11/6/08 7:08:52 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
11/6/08 7:08:52 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
11/6/08 7:14:10 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[73]) Exited: Terminated
11/6/08 7:14:27 PM Finder[93] [QL ERROR] Generator database update takes too long... we will use what we currently have
11/6/08 7:16:10 PM com.apple.loginwindow[22] Shutdown NOW!
11/6/08 7:16:10 PM com.apple.loginwindow[22] System shutdown time has arrived
11/6/08 7:18:05 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
11/6/08 7:18:05 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
11/6/08 7:18:05 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
11/6/08 7:23:20 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[72]) Exited: Terminated
11/6/08 8:52:10 PM com.apple.launchctl.System[2] fsck_hfs: Volume is journaled. No checking performed.
11/6/08 8:52:10 PM com.apple.launchctl.System[2] fsck_hfs: Use the -f option to force checking.
11/6/08 8:52:12 PM com.apple.launchctl.System[2] launchctl: Please convert the following to launchd: /etc/mach_init.d/dashboardadvisoryd.plist
11/6/08 8:52:12 PM com.apple.launchd[1] (org.cups.cupsd) Unknown key: SHAuthorizationRight
11/6/08 8:52:12 PM com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
11/6/08 8:57:33 PM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[74]) Exited: Terminated
Thanks,
Chris

Forced shutdowns can cause filesystem corruption and should be avoided when possible -- and not be used as standard operating procedure.
After a forced shutdown I always run DiskUtility and verify the hard drive.
Your longer startup time is probably due to the Mac trying to verify the system with fsck after the forced shutdown.
Suggestions:
1) Run DiskUtility and verify the hard drive; if it won't verify, you'll have to boot from the original install disc (hold down C key at boot -- using a wired usb keyboard) and run DiskUtility from the Utilities menu at the top of the install disc screen;if you can't repair the drive with DU you may have to back up your data and do a clean re-install of the OS; alternatively DiskWarrior may be able to repair a drive that DiskUtility can't.
2) Get to the bottom of this problem; your current MO is going to cause you more and more grief
3) Try pressing the menu button on the Apple remote once to wake the Mini
4) Don't do a PMU reset on an Intel Mini -- Intels get the SMC reset instead of the PMU reset -- the PMU reset procedure is known to cause problems when wrongly applied to Intels.
5) If you can get your hard drive to verify and you still have problems, reapplying the latest combo update of OSX can sometimes clear up problems.

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Step 12
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TS3824 2011 mac mini won't go past white screen with apple logo

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