The sound is screeching when the volume is louder

that's called breaking up or overloading it means that the speaker is being asked to play louder than it was designed to play!! this will ruin the speaker at all volume levels if allowed to make that sound for very long..advice? lower the volume till that noise disappears it's not a product fault it's user error advice turn it down or buy a more powerful unit to achieve the volume you want/need

Check its speaker first. If it is found OK, check and replace audio output board as card basis. Visit the site named 'Electro-help' for more details. Click this link. View it in 'Flip card' option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 900 posts to different brand TVs now.

http://cgi.ebay.com/JBL-Dock-Adapters-Compatible-Apple-iPod-iPhones-/220785849512?pt=UK_MP3_Player_Accessories&hash=item3367dcb4a8

CR2025

When the OnStage speakers first came out, the charger was not compatible with 3g iPods or iPhones. Newer speakers have an upgraded charger and will charge all current iPods/iPhones (up to and including iPhone 3Gs)

Bad news is that there's no way to upgrade an old OnStage.

You can test yours by trying an iPhone 3G (if you have a friend with one, for example) to see if you have the old or the new charging circuit.

The JBL Onstage Micro is supposed to disable recharging of the iPod when running off AAA batteries to avoid draining them, but sometimes this setting gets stuck even when the unit is plugged in through the AC adaptor. The workaround that I found is pulling out and reconnecting the iPod to the Onstage Micro (while both are powered on) and then unplugging and reconnecting the AC adaptor. Sometimes you have to repeat this process, but the iPod should start recharging after that. I tried it on the new 5th generation nano and this seems to work.

use another device like your i pod to make your jbl sounds louder and then plugged it to your pc without turning it off. after plugging try to test it if works.

where did you buy it from? I got a few solutions. Email me at [email protected].

Yes it can be repaired through company workers so please contact your nearest speakers shop to be get repaired as quickly as possible...
thankyou...

According to the user guide the clicking sound seggests a fault with the powersupply.