My un60f7100 Samsung shutdown 2 or 3 times and after that its ok its only on start up

I will try a new main board first.

See if you can reset the electronics without losing your data. Check with outfit that provided your phone.

you can shutdown system very fast
go to Run and type "shutdown -t 2" t is time which will shutdown in 2 minutes by giving the seconds like 1,2,3.

If its not working, then manual shutdown is only possible coz, either virus is affected or some other process is taking your memory resources

Power supply board is dead.Know how to solders?Check these capacitors for bulge up or pop open,replaced these capacitors will solved this problems.Or can buy a whole reburbish power suppply board at Shopjimmy.com,Ebay.com for the replacement.

When you shutdown your Windows XP computer, it may take more time to complete the shutdown process. Slow shutdowns are caused by a number of factors. One of the common cause is the Clear Pagefile at Shutdown option enabled.

Some points to improve the shutdown times:

Follow these steps to open registry editor.

1. Click on start and the click on run
   
2. In run dialog box type regedit
   
3. Either press enter or click Ok button on the run dialog
   

Start Registry Editor and navigate to the following key:
[HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management]

Set ClearPageFileAtShutdown value to 0.

did you check the switch if can do a shutdown process after you press the power button for 2 or 3 seconds? If not there's a problem with the switch...but if it shutdowns ok then I suggest have the OS re-installed to isolate the problem. You can use a separate HDD to do a disk recovery install. At the same time you can make the original disk as your backup.

ok get Windows XP mananger or TuneUP utilities and adjust the speed of your shut down, if you have a bluetooth adapter try shuting it's radio off at shutdown time.

sounds like an intermittent shut down which is heat related. some part , maybe one stuck on a heatsink is warming up and running too much current triggering shutdown.
to find it you can tell what is shutting down with a voltmeter, or you can heat suspected parts with a blow dryer to speed the shutdown .. or freeze spray to see if it goes beyond your shutdown time.

Hi Brandy19960,

Thanks for the posting in FIXYA.

Please do the following steps:


Step – 1

Right-click on My Computer, open Properties, click the Advanced tab. Under “Startup & Recovery,” click Settings. Under “System Failure,” Uncheck the box in front of “Automatically restart.”



Step - 2


To change the setting, click Start --> Run--> type GPEDIT.MSC, click OK.

Drill down to Computer Configuration | Windows Settings | Security Settings | Local Policies | Security Options.

In the right pane, find “Shutdown: Clear Virtual Memory Pagefile.”

NOTE: Since someone actually has to have set this policy, the problem will be pretty rare, but is worth mentioning. However, Forum participant “roadrunner” reported that the personal security app Privacy Eraser automatically enables “Clear virtual memory pagefile,” and, therefore, may be the cause of a slow shutdown.



Step - 3

When Windows XP won’t powerdown automatically, the APM/NT Legacy Power Node may not be enabled. To enable this, right-click on the My Computer icon, click Properties | Hardware | Device Manager | View. Check the box labeled “Show Hidden Devices.” If it’s available on your computer, there will be a red X on the APM/NT Legacy Node. Try enabling it and see if this resolves the powerdown problem (Tip from Terri Stratton). Or, to check the other side of the APM/ACPI coin, open the Power Options applet in Control Panel. If there is an APM tab, make sure the “Enable Advanced Power Management Support” box is checked.


Step - 4
----------

Try a Shutdown shortcut -


For a shortcut to RESTART Windows XP:
SHUTDOWN -r -t 01

For a shortcut to SHUT DOWN Windows XP:
SHUTDOWN -s -t 01

Step 5
---------

WORK-AROUND: Disable power management for your USB hub: Open Device Manager (click Start, click Run, type DEVMGMT.MSC, click OK). Double-click to expand Universal Serial Bus Controllers. Double-click USB Root Hub. Click Power Management. Uncheck the box “Allow the computer to turn off this device to save power.” OK your way out

Step – 6
-----------
Click on the Start button.
Select Run from the menu.
In the run dialog box type “msconfig”.
Click OK.
Once in the msconfig utility select the startup tab. In the startup tab you will see several programs listed with a checkbox beside it. If there is a check mark beside the application listed, the application will startup when your computer starts up.

Regards
ELLIN