SonyEricsson K790a - wet battery

Battery is dead, plug into the charger, the battery indicator turns orabge when the battery is almost totally dead.

The blinking orange light is an indicator that you missed a call, got a text or have voicemail...it can be turned off by going to Settings-Display-Notification Flash...I can't cooment on the "wont turn on" but I know that if the thing is constantly flashing, it is constantly on...If you haven't already, open the battery and look for any pink dots...if you see any, it got wet, but I have dropped mine in a dog's water bowl, let it dry for a month and she works beautifully!! More than likely, you need a new battery...the battery for the htc EVO is the same as the Amaze...just don't get it from China ot pay more than $12 for it!

Sit the camera in sunlight for few hours until its get warm and make sure the battery and memory card out and the doors must be open . After that insert the battery only and try to turn on and see the result.

The battery is completely dead, charge for about 1 hour; if flashing light continues then you need a new battery, I've just done this to my phone..

The triangle shapped one is the symbol for bluetooth. It should light up/flash when you have the unit paired to a phone that is turned on

hi,
if you have tried both batteries with the same laptop and they are giving you the same error code, then it could very well be a motherboard problem, both the batteries cannot be bad, what you can do is try these batteries on some other compatible laptop model to check if they work fine there. Also try swapping the AC adapter as in both case you might be using the same Ac adapter, try using some other good known AC adapter as well.

Further queries are welcome
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Maybe the Bluetooth transmitter has been damaged. Try giving the phone to a specialized shop.

try this
http://www.akshayy.com/sonyericsson/tutorials/red-light-blinking-dead-revive-it-to-life/

The flashing battery light is an indication that the system is attempting to charge the battery. The orange light indicates a problem charging one of the battery cells. This usually means that the battery either needs to be recalibrated or replaced. To recalibrate the battery just use the system until the battery is dead, then recharge and repeat the process twice, after which time the battery should be recalibrated. If this doesn’t fix the flashing orange light then the battery may need to be replaced.

hope this helps

Try Discharging your flash via Secret Service Menu. Hope it'll save your day. How to find Secret Service Menu ??? Type Sony Ericsson Secret Codes in Google and you'll get all. ;)