Takes to long for it to turn on. Think the switch is going bad.

Not,the switch problems.Take to long tv to turn on?The power supply board,have dying parts call the capacitors.That the board,where power a/c cord plug into it.Check the power supply board,for those dying capacitors.These dying capacitors alway bulges up on it tops or puffing up on it top.U have tools like a soldering iron,desoldering pump or desoldering braid,solders?U can do basic soldering?U know basic electronic?Must replaced all these dying capacitors on the power supply board,that are bulges up on it tops or puffing up on it tops.The tv,will power up normally and fast.Or tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

I believe your problem is going to be defective filter capacitors in power supply. Classic symptom of taking longer and longer to come on. Will get progressively worse over time then wont come on at all. No need to replace the whole power supply board. Most knowledgeable repair shops will replace the swollen capacitors or you can try yourself if you are familiar with electronics.

The defective capacitors will usually swell up out the top making them easy to spot