I have a insignia 26inch lcd flat screen tvmodel number ns-ltdvd26-09 dvd combo and i turn it on with no other hookups just power cord ..and it powers up goes to blue dvd screen if i dont touch it it will stay on 20 60 seconds then powes off it does it every time ..and some times wont even come on ...and for the few seconds it does the screen is white with fat lines in it ...i look for a blinking diognostics light but have never seen it blink when tv is on stand bye the power light dont blink ..now there is a green lite on the power board inside tv and when i do power it up tjhe light on the power board dont come on

SOURCE: Insignia NS LCD32 standby light blinking off and on. No Power

I had this problem as well. Actually best buy just left my hosue to fix it. This is the second time they were here to fix it. The first time they said a part was loose. This time they had to replace a part.

Ginko

• 19396 Answers
• Posted on Apr 19, 2009

SOURCE: 26" Insignia LCD TV will not power up. Green Light Blinks 1x

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

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LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.