My iphones sleep/wake button is broken and i cant turn my iPhone back on. Please HELP?!?!?

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My iphones sleep/wake button is broken and i cant turn my iphone back on. please help!?
Okay so the sleep/wake button on my 3G is completely broken off, i mean there's a big hole in the top of my iphone where the button has come out.

So i can't use that for anything, cant turn the phone on/off, put it in sleep mode, put it into DFU mode with it - nothing.

My solution to this lack of sleep button was to jailbreak my device and install SBS Settings so i could turn the phone on and off put it in sleep mode etc using that...

But, using the SBS Settings i powered off the iphone... and now i can't get it back on :S

The home button won't turn it on (which i think is ridiculous) and i've tried everything from plugging it into the mains, into the computer, trying to get it into DFU mode manually (which was pretty stupid cos the phone doesn't even register on the computer)...

Now i'm really stuck cos apple won't sort it because it's jailbroken...but it was only jailbroken in order to install SBS Settings so i could compensate for the broken sleep button which i couldn't afford to get replaced..

If anyone has a solution to my problem, either with working around apple to get it fixed or a solution to getting the iphone back on, i will be SO gratefull... :)

If you plug it into a wall jack it should power on. If it does not, you either have a faulty charger/cable, or the iPhone is actually in DFU mode. Seeing how the computer does not recognize the iPhone, your phone likely thinks the power button is depressed. Unfortunately, the only good way to resolve that is to replace the ribbon cable controlling the power button, which is the headphone flex. Read some of the hints on this page, it might help you understand what that cable is and why it would need replacing.

Fortunately the cost is not extreme, and should run you around $50 to get repaired, locally, or on the internet. You might also look into replacing the entire back of the iPhone which includes that cable, a new battery, and a whole slew (sp?) of components, check that out here:

Those should run about $75-100, and will practically make the iPhone look and work brand new!

iPhone thinks headphones are plugged in

See our post about Headphone Jack Cleaning....

If you have a 2G iPhone, this is a common issues that was resolved in later model iPhone 2Gs with a redesigned cable for the headphone flex. To remedy this on a 2G iPhone is to plug/unplug headphones into the jack until it works. Sometimes resetting the iPhone with headphones it will resolved this (after removing them when the phone completely boots).

If you have a 3G or 3GS iPhone, this is likely due to liquid damage. Peer inside the jack and see if you find a half-circle of a red marker inside (if red, you have liquid/water damage to the headphone jack). iPhone 3G Headphone Flex Replacement and iPhone 3GS Headphone Flex Replacement

How to clean your Headphone Jack

2G, 3G, 3GS and iPhone 4 headphone jacks can get dirty, grimy, corroded and/or filled with lint, which can hamper you getting the full use of your iPhone. Symptoms that may be resolved by cleaning your iPhone headphone jack is...

• the headphone jack won't fit down all the way*
  
• Sound only coming out one side or speaker
  
• Moving the headphone jack makes audio go in/out
• Earpiece doesn't work during Phone Calls (test by hitting the volume keys while the iPhone is unlocked: if the iPhone indicates that you are changing the heaphone volume and not the ringer volume, it thinks something is plugged in when there is not! )
• You can see dust/lint inside the headphone jack.
  

How can you resolved that?

Our recommendation is two-part:

• Take a needle and pic out what dust, dirt and lint you can out of the headphone jack
  
• Take a Q-tip and pull off some of the cotton (about half from a name-brand Q-tip) and twist the remaining cotton around the stick. Make sure it's small enough that you do not have to jam it in the jack, but large enough that when you spin it, it can clean the contacts inside the headphone jack.

DO NOT GET THE Q-TIP WET WITH WATER OR ANY CLEANER AS THIS CAN SHORT OUT DIODES NEAR THE JACK AND PERMANENTLY HAMPER OPERATION, TURN THE LIQUID INDICATOR INSIDE THE HEADPHONE JACK RED AND INVALIDATE THE WARRANTY!!!

* except for 2G iPhones that have a recessed headphone jack, you might need an adapter for non-standard iPhone headphones.

If cleaning your iPhone headphone jack did not help, check out these replacement services:
iPhone 3GS Headphone Flex
iPhone 3G Headphone Flex