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Dan
Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 7006
Experience:  USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
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My RCA model 46LA45RQ has power (red light) but will not come

Resolved Question:

My RCA model 46LA45RQ has power (red light) but will not come on. I have unplugged for 5 to 10 min. and tried with no luck?
Submitted: 3 years ago.
Category: TV
Expert:  Dan replied 3 years ago.
Thanks for the question. My name is Dan.

Just a couple questions so I can get a better idea about what's going on here.

1. What happens when you press the power button?
2. How long have you owned it?
3. Do you have repair experience or are you just trying to figure out if it's reparable?

Respectfully,
Dan
Customer: replied 3 years ago.

1) Nothing happens

2) 6 to 8 months

3) I have some expierence but can find no schematics to trouble shoot with.

Expert:  Dan replied 3 years ago.
If you've owned it less than a year, are you sure you want to open it up for troubleshooting? You're still covered under warranty.
Customer: replied 3 years ago.
Purchased used from friend, he is gone out of town working?
Expert:  Dan replied 3 years ago.
So you'd like to bypass warranty and repair yourself? If so, no problem... we'll need to remove the TV's rear panel and have a close look at all the capacitors inside the unit. Are any of them puffy on top, leaking maybe? Any not totally flat like the others?
Customer: replied 3 years ago.
all caps look good
Expert:  Dan replied 3 years ago.
Ok, let's measure the DC voltages coming out of the power supply. Red lead on any pin or connector with a label, and black lead on ground. Let me know what you get.
Customer: replied 3 years ago.
out of the main power strip on first pin 5.1vdc
Expert:  Dan replied 3 years ago.
Ok, that's our standby line. Next...
Customer: replied 3 years ago.
pin 2 is .146vdc the other 7 pins are 0vdc
Expert:  Dan replied 3 years ago.
Pin 2 is 140mV?? That's almost negligible. Can you double check?
Customer: replied 3 years ago.
the first plug from the bottom ia 13 pin plug 1 thru 3 are blank 4&5 are 0, 6 is 5vdc, the rest are small mv to 0. The power supply is putting out 0 on the 12vdc and 0 on the 24vdc pin above it? I s the dc side fused?
Expert:  Dan replied 3 years ago.
Please read this whole post. If you have more questions afterward, just ask. Once you're satisfied and feel you can leave positive feedback about our conversation, please click the green "Accept" button (that's how I get paid). Thanks!

The only fuse I see is on the AC line. With your model, if the power supply isn't sending all proper voltages, replace the power board... no need to investigate further. Part number should be RE46AY3001, but see if you can get a number from your board to confirm. Searspartsdirect.com has replacements.


Dan
Customer: replied 3 years ago.
Dan thanks alot i kinda figured that was the problem but doesn't hurt to get an experts advice before spending the money replacing parts...thanks again.
Expert:  Dan replied 3 years ago.
No problem. Please click "Accept" at this point.

Take care,
Dan
Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 7006
Experience: USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
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