Blinking led i havechange the motherboard an power supply an the problem is the same.i try reset it just come on go back off.but this time the power led an the opc led just stay on .help

bad power transformer return unit

This sounds like a power supply issue. Are the fans in the system plugged into the board? If so, are they kicking on and off at the same time at the power light? Make sure you have a good working PSU and tried that in place of the one you are using.
If that doesn't work, start removing parts until you have just the motherboard and the case speaker plugged in (plus your power button of course). Once you have removed the faulty device, you should start getting a beep code from the motherboard. If you put a known good part back in and it does it again, then the slot on the board that the part seats into is bad (IE: RAM slot if RAM replaced, etc) and you need a new motherboard.

...and?

Hi,
Red led blinks 4 times is an error code that shows that fan is not running in tv, check fans connections and make sure all are plugged properly.
Thanks.

From your description, I agree with you assessment of a likely Motherboard failure.

Here are some troubleshooting steps. From your description, my impression is a bad motherboard.
http://www.fixya.com/support/r3581893-how_to_troublehoot_a_portable_compouter_

1. Remove All External Devices
2. Check the Computer's Power LED
3. If the power LED has not changed unplug the Power Cable From the Computer Disconnect All Hard Drive Power and Data Cables and power on the computer. If still no go.
4. Remove All PCI, PCI-E, and AGP Expansion Cards .
5. Remove All Memory From the Computer
6. Reseat the ATX and 12-Volt Connections . The ATX connector will be a 4 pin square connector connecting to the motherboard from the power supply and the 12-Volt Connection would be the biggest connector with a lot of colored wires.
7. If still no go.
8. Disconnect the Power Connection to the Chassis Fan
9. If the light still flashes then it could be a power supply or motherboard failure. Try a good know power supply first and if that does not fix the problem it is the motherboard. Also check the back of the tower for 4 lights lables ABCD or 1234.
Rate if useful.

5V Stand-By Indicator LED
The power supply will always supply a 5V standby voltage to your
motherboard so that it can power on via for example Wake On Lan
technology. This LED shows that your power supply is supplying
this standby voltage to your motherboard.n :D

You may need to replace your power supply, if the LED is flashing, it's not supplying the power the motherboard needs.

[JP-25]

1 2 3 4 5 6 7 8 9
. . . . . . . . .
. . . . . . . .
10 11 12 13 14 15 16 17 18


1] Power Led (+)
2] --
3] Power Led (-)
4] --
5] --
6] Speaker (+)
7] --
8] --
9] Speaker (-)
10] Reset switch
11] Reset switch
12] N/A
13] Power Switch
14] Power Switch
15] ACPI Led (+)
16] ACPI Led (-)
17] HDD Led (+)
18] HDD Led (-)


For future reference you can download your motherboard manual here:
(PDF) Soyo K7VKP2

you can try resetting the tv by
1. unplugging it
2. pressing channel down and volume up buttons at the same time while plugging tv back in
3. if you here a click, the tv has been reset

it all depends on the number of flashes , pause, repeat.
Since the problem did not indicate any beeps her is the following info


Power LED blinks RED 2 times, one every second, followed by a
2-second pause. = Processor Thermal Protection Activated


3 blinks 1 second apart = Processor not installed (not an indicator for a bad processor).

4 blinks 1 second apart .= Power Failure (power supply is overloaded)

Other possibilities are:
5 blinks 1 second apart No memory
6 blinks 1 second apart No graphics
7 blinks 1 second apart System board failure (detected prior to video)
8 blinks 1 second apart Invalid ROM