Backlite flashes for a minute then go out completly. Need a service Manual.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Unplug the set for five minutes. Turn the set back on. That completes the RESET cycle and the system should correct itself. If not, it's time to take it into the shop.

power sliding?
the steps for working the dash are all covered in the FSM
the factory service manual..... for sure.
or alldata.com (usa spec cars)
i think this is the dash park lamp dimmer switch.
the adjuster knob is bad.? in some why?

Try changing the input device to something you are sure works. Switch off TV manually, switch off power, remove plug and retry after 48 hours. If problem persists, please refer it to a qualified service technician.

Here is the screen shot from the service manual

If you need the complete refernece on how to complete this job let me know I can get the manual uploaded in about 45 minutes. As I have to get to a service call.

Hi, what you can do is to replace the power inverter that's located in the front bezel of the screen just remove the front bezel and locate the inverter. If you want to replace it just buy a new one in a computer part store, or online at www.yahirselectronics.com. Hope this helps you.

This model is having a problem of backlite. please check it independently for hour or so. If the same sign then the problem may be with backlite.

You may also approach authorised service personnel for this defect.

Try first unplugging the power cord for thirty minutes.
If the error does not clear then it is probably a faulty control panel.
When the fault is on a different part (eg. pump, sensor etc.) you get an error code.

You can find the replacement control/timer assembly here.

If you need to call repair service you can use the number printed at the end of the owner manual.

If the Psp turns on and you can hear the O/s " Operating system start up, your backlite has burned out. This is a common problem with alot of handheld products and isnt so difficult to replace. You will need the tools to open and replace including a new lcd or backlite. (Ebay.com) sells backlites and lcd combo's at a reduced price. If you are under a 1 year warenty give sony a call, but dont tell them you think its the backlite, ask alot of questions and see if its covered, mabye a full replacement can be sent to you only the cost of Shipping. Give it a try and if no luck mabye I can jot down the steps to remove and replace the backlite.
Notice: The backlite may not be the problem, if you replace the backlite and it still is un-functional, then you will have to replace the lcd. The backlight is easy to replace if you take your time and isnt as cheaper to do then a whole lcd replacement.

Please reduce the resolution/ Frequency of your Display Card in system and see whether you can see some thing. Else connect this monitor to another system with low resolution. Let me know your feedback.