I have a Olympus fl 50 flash that won't power on. I have tried several different batteries and no luck. Any advice?

SOURCE: Connect an FL-20, FL-36, FL-40 or FL-50 external flash

The FL-20, FL-36, FL-40 or FL-50 dedicated external flash can be attached directly to the hot shoe on the camera. To use the FL-20, FL-36, FL-40 or FL-50 flash off-camera, you will need a bracket and appropriate flash cable. Please use the following information as a reference: FL-BK01 Flash Bracket (item #200666) - used to mount an external flash to the C-5060 Wide Zoom. FL-CB02 Hot Shoe to TTL Cable (item #200663)- this cable is required for the dedicated FL-20, FL-36, FL-40, or FL-50 flash.

SOURCE: Connect a FL-20, FL-36, FL-40 or FL-50 dedicated external flash

The FL-20, FL-36, FL-40 or FL-50 dedicated external flash can be attached directly to the hot shoe on the camera. To use the FL-20, FL-36, FL-40 or FL-50 flash off-camera, you will need a bracket and appropriate flash cable. Please use the following information as a reference: FL-BK01 Flash Bracket - used to mount an external flash to the C-750 Zoom. FL-CB02 Hot Shoe to TTL Cable -this cable is required for the dedicated FL-20, FL-36, FL-40, or FL-50 flash.

SOURCE: Connect an FL-20, FL-36, FL-40 or FL-50 external flash

The FL-20, FL-36, FL-40 or FL-50 external flash can be attached directly to the hot shoe on the camera. You also can use the FL-BK01 Flash Bracket and the FL-CB02 Hot Shoe to TTL cable.

SOURCE: Why is my fl 50 is flashing out of sync ?

Set Shutter at 125 or smaller
Set Aperture at 8
You never told us what camera was flash attached to.

[email protected]

SOURCE: need more power for fl-50

Use Sanyo Eneloop NiMH batteries. These are slow-discharge batteries that will keep you going for a long time. Cheers