NIKON MH26 BATTERY CHARGER BLINKING GREEN LIGHTS

Depending on the color the lights blinking. Red light blinking usually means charging. Green light on or blinking usually means charged. If its blinking red and green, usually means bad, or defective battery.

Until the green light stops blinking and glows steadily. Of course, that's for the Nikon charger. If you're using a third-party charger, refer to the instructions supplied with it.

No, the green light will stop blinking and glow steadily. Of course, that's for the Nikon charger. If you're using a third-party charger, refer to the instructions supplied with it.

I don't think the charger will blink again when you put back the battery.
The manual says, when the battery is placed and the charge lamp does not glow, the battery is defect.
See the manual:
link to manual

This is a old post, But the prob is/was your Battery if defective.

Read page 16 of the manual. Do not use any other charger with this camera. Are you sure you have the battery inserted correctly? When trying to charge, does the green light blink? If so, when it stops blinking and turns off, the battery should be fully charged. Do not attempt to turn the camera on while the charger is trying to charge the battery.

If both lights are blinking on the charger after putting the battery on to charge, the battery is no longer chargeable. Most likely it's bad cells inside the battery, the charger is reading the battery as bad and will not charge it. The only fix is to buy a new battery.

Ok
A few things to try
1.) Check the laptop on an external monitor, do you get a picture
2.) Is there power to the laptop from the battery and the charger? Try to see if the charger indicator lamp is blinking green rather than steady green
3.) Can you hear hard drive / fan noises and are there any lights on the laptop?

If the charger is blinking, indicates that power is not making the circuit, check tightness of charging port, if tight, assume fault on motherboard / blown main fuse

If picture on external monitor and not on laptop, assume backlight on screen dead or possibly the inverter

If no noises from HDD or Fan and No lights on laptop, then fault with motherboard

If you do get fan noises etc, but get BLINKING lights on laptop, assume possible fault with graphics chip, repost with details of blinking lights / colour and specific model of laptop

I couldn't find a reference to a blinking green led when the d90 is off.

I would refer you to Nikon tech support for this one.

http://imaging.nikon.com/products/imaging/worldwide/index.htm

The above link has 1-800 numbers for Nikon.

Check the PDF manual on the software disk to be sure Nikon Technical Support for confirmation- this is a possible replacement situation