No red light...wont turn on

Need help, no red light when plugged in, wont turn on!
history:
My Bold 9900 has been rebooting itself and not recognizing my memory card for about one month. Usually a quick reboot is all that is needed to restore the phone but not the memory card.
Last night I plugged my phone into the wall to charge and this morning it was unresponsive. No red light, no yellow light, nothing. I tried plugging it in with another plug and let it charge for several hours but still no activity.
I have tried:
several times to do a quick reboot by removing the battery waiting and then replacing the battery.
I have let it charge, removed the battery for 15 minutes then left it alone for 2 hours. 
I am using a Mac so not sure where/how to do the system reboot. Yes i have Blackberry desktop software, but cannot follow the windows directions since i have a Mac.
Suggestions please?

Hi and Welcome to the Community!
I think you may have already tried this first part, but I cannot be certain. Therefore, please try this sequence...note that, throughout the entire 4h15m process, your BB must remain directly connected to a known-good wall charger (not PC USB, not a cradle):
With the battery inside, connect your BB to the wall charger
Leave it alone for 2 hours, no matter what the LED or the display does
Remove the battery
Wait 15 minutes
Insert the battery
Wait another 2 hours, no matter what the LED or the display does
This has been known to "kick start" some BBs.
It is also possible that your battery or BB has experienced a problem...to test, this sequence is needed:
Obtain an known good and already fully charged additional battery...use it in your BB and see what happens
Obtain access to a known good and identical BB...use your battery in it and see what happens
The results of this will indicate if it's your BB or your battery that has the problem. Note carefully please that "new" and "know good" are not necessarily the same things. While rare, a "new" battery certainly could be defective. Rather, the simplest (and least costly, btw) method to conduct this test is to find someone with an identical BB who has no issues...trade batteries and see what happens.
Good luck and let us know!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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