[Mark Nord]

Weird thing!
According applicationStart.xml the PRS600 already use

		<function id="doPowerSwitchHold">
				var value = this.getVariable("STANDBY_STATE")
				if (value == 1) {
					this.setVariable("STANDBY_STATE", 2)
					this.post("kShutdownBySwitch", true)
				}
			</function>
			<function id="doPowerSwitch">
				if (!ebook.pm.isWaiting()) {
					var value = this.getVariable("STANDBY_STATE")
					if (value == 1) {
						this.setVariable("STANDBY_STATE", 0)
						this.resetLight()
						this.container.STANDBY_IMAGE.show(true)
						this.container.STANDBY_IMAGE.enable(true)
						this.setFlushUpdate()
						this.post("kSuspend", true)
					}
					else if (value == 0){
						this.setVariable("STANDBY_STATE", 1)
						this.container.STANDBY_IMAGE.show(false)
						this.container.STANDBY_IMAGE.enable(false)
						this.setFlushUpdate()
						this.post("kResume", true)
					}
					else
						this.setVariable("STANDBY_STATE", 1)
					BookUtil.removeButtonEvent(this.container.getWindow(), "kPowerSwitch")
				}
			</function>
..
<customHold key="kPowerSwitch" hold="doPowerSwitchHold" up="doPowerSwitch" holdTime="3000"/>
..
        <standbyImage id="STANDBY_IMAGE" left="0" right="0" top="0" bottom="0" active="false" visible="false"/>
</document>

So the PowerStandby code included in ebook.so will never be called, because a key-action is triggered instead!
[Edit] At last it seams "ebook.so" is to some extend, or even completly replaced by "ebookSystem.so" [/Edit]

Compared the 600th code to the PRS350/650 some functions in main.xml are missing!

	<!-- [FY10] Ticket#661: setup standby picture -->
			<function id="preDoEditStandbyPicture">
				var indexs = this.MENU.detailsView.getSelectedIndexs();
				this.bubble("doEditStandbyPicture", indexs);
			</function>

So I assume hacking in the 650-main functions in the 600 main.xml will enable the standby-pic.