How do I save my LG LS670 Optimus S (it is grey not responsive)?

[AC Question]

LG LS670 Optimus S grey not responsive

I bought a refurb LS670 online. It looks good, but won't power up. I put it on the charger and then the screen started flashing "LG" once a second. After 8 hour charge, the phone is still in the same condition.

The phone has shown only one other indication of status: when I removed battery and plugged in charger, phone displayed "battery required" graphic.

Can the phone be salvaged, am a missing something, or should I just return it to the seller for a refund?

 

[factsmachine]

Solved the problem: hoping that there was just a problem with the battery, took the unit to BatteriesPlus, where they tested it out and somehow got the battery to take a charge. They told me that li-ion batteries sometimes get stuck in a discharged condition.

I found some relevant info here:
http:++batteryuniversity.com+learn+article+low_voltage_cut_off