My Samsung R40 will not charge. The cable/charger

I would first check the charging port for dirt or debris. You said you used multiple chargers and cables. Did you use brand new cables or just ones that worked with other devices. I ask this because I have had phones that would get loose and would only work with new cables, even though the same old cable would work with other devices with out trouble.

Could be a battery problem, ut is usually a problem with the charge cable or connector. Try a different charge cable, they are usually Micro USB connectors, and check if the power (MaH) Matches what your phone needs. Otherwise you might need to repair the port. Try this.

http://www.youtube.com/watch?v=q4e-5xkhvHA

There are a couple of common problems that can cause bad charging:

1. Bad charging cable - try a new cable
2. Bad charger - try a new charger, or try plugging it into a PC USB port overnight with the PC turned on
3. Charger is not the right charger for your tablet - Samsung devices are known for being picky about what charger you use. If you don't use the original charger that came with the device, or a Samsung charger made for your specific tablet, you will have trouble.
4. A bad/broken charging port on the tablet - this is not something you can fix yourself. You would likely have to return it to Samsung for repair, or find a local repair shop.

Something, a component, in the laptop may have fried the charger. I don't know for sure. You would have to trace the circuit with a multimeter to locate the bad power component.

try this ..get a qtip and dip in 99% rubbing alcohol. not too wet. just damp. clean contacts on the charger port. use a magnifying glass and light to check if its clean. let it dry for 20 mins. it will also help if you have airplane mode on but its optional. use oem charger and cable or ipad charger works fine with samsung cable. hope it helps

Please remove battery and connect charger and turn on computer. If on adapter working fine, now connect battery without removing charger , and check charging.

The Camera would work with 4 AA batteries of almost any type. However a high capacity rechargeable battery would be more economical in the long run and you need a charger too. NiMh batteries with capacities of between 1200mah and 2900mah would be fine. The Hybrio type comes ready-charged and retains its charge best on the shelf. Therefore I would recommend e.g.
Four, Uniross Hybrio AA 2100mah rechargeable batteries

If it charges from the data cable connection, then the problem may be in the charger. If you have a car charger, try that first. If it charges from the car charger (or if you can find a friend with the same model, and it charges from their charger) then the phone is fine and your charger has just failed.

Your power charger is fu.k.d up.  Get you a new charger on e-bay for cheap and try charging.  If that don't work, then the IC card charge port is fu.k.d up.  Open this puppy up and replace the thing.  You can find these parts on e-bay for cheap as individual parts or you can buy you a whole broken computer and use it for parts whenever parts on your computer start to fail.