Okay as of the post I have read you are the guy I need to talk to. A
lady from my work gave me this TV for free saying that she was going to
throw it away because it wouldnt turn on and that the speakers made a
funny noise. well once I got it I plugged it in and the screen wouldnt
display and there was a patterned pop pop pop pop sound and the status
light on the front would go yellow once then repeat red till i turned
it off. my dad is a electrical engineer and he told me it sounded like
it was a bad cap on the power supply. so i decided to carefully tear
down this tv.. right now I have pulled the power supply and was
wondering in better detail which capacitors I need to replace and what
sizes.. dad told me he would help me replace any that needed replacing
but he wanted me to find out which once. so any help you could give me
would be very appreciated. /if you need I could send you pictures of
anything and the power supply PN is HY342-5991-09C V1.2
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Re: LCT2715 problems with power supply?
First I would need a model number and you should have on-hand a good ESR meter. A CapAnalyser88 is a good one for about $180.00 plus shipping.. Then I'd be glad to sit down and roll our sleeves up as it were..
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The led is blinking due to fault in power supply board.
On the power supply board there are some capacitors and ICs .if any of those gets short or faulty the power supply board will create problems and the red light will start blinking.
The components on the board needs to be checked with the help of multimeter and continuity tester.And the faulty components needs to be replaced with the help of soldering iron.
the procedure to check the power supply board is as follows:----
1) You are going to need a Phillips ( X ) Screwdriver for this procedure. The first thing you will want to do is find a suitable location to disassemble the TV. Try to find somewhere with plenty of space to work and preferably somewhere you will not have any hazards such as static (like carpet) Lay the TV Flat on its face (picture side down) and remove the 4 screws from the back of the TV holding the base on. Next you will want to process to remove the screws around the back cover. There are 12 screws you will need to remove (refer to picture for locations). Carefully remove the back panel of the TV. It may snag on the coaxial connector so be careful. 2) Once you have the back off of the TV you can see the Main board and power supply covers.You will now need to remove the left (right side from the back) speaker cover to allow access to two of the screws holding the Power Supply Cover in place. This is easy and pretty straight forward and has 8 screws around the perimeter. Once you have the speaker cover off you should be able to access the screws on the side and you will also want to remove the other screws from around the sides of the cover. Some TV's I have worked on only had 6 where others had 7 or 8. Just make sure to remove all of the screws before trying to remove the cover. Once you have the cover removed you will see the Power supply. Remove the wiring harnesses from the power supply board. You will have 4 cables at the top of the power supply and one main power input at the bottom. The main power input may have some glue securing it in place. Simply cut this with a knife or pull it loose. Once you have the cables off of the power supply you can remove it from the TV via the screws on the 4 corners. Be careful not to damage anything as you remove these screws. You now have the Power Supply removed from the TV.you can now get the power supply repaired from any local tv repair technician.or get new replacement power supply from the service center.or from online stores like :www.partstore.com or from www.shopjimmy.com Thanks. you can rate this solution and show your appreciation.
Both power supplies are supplying the same voltages to the circuits but in order to use the one from the NS-27LCD 27" you will need to change the wiring configurations to make it work for the LCT2715..
I could repair the power supply from the LCT2715 for under $90.00 including parts, labor and shipping it back to you.
Let me know if you require further assistance.
For him to have only replaced 3 resistors and charge you $269 is ridiculous. All be it I can say he would be justified in charging for in home service $200 for 3 resistors is just wow... I have not had a AKAI LCT2715 in my shop that had this issue but if I had I would probably start by checking out the power supply which not only provides power to the TV's main board but filters it and this if failing could cause other issues or even damage keeping in mind that this is a primary fail point on these TV's. My suggestion is to take it to a more reputable repair center and get a quote on repairs. If you would like me to take a look at the power supply I can and if it needed repaired I perform this service for $100 + Return shipping and I do accept paypal so you can pay after I have examined the unit and determined if it even needs to be repaired. If you need to know how to remove the power supply I have created an instructable to help those who need it. You can find it here http://www.instructables.com/id/AKAI_LCT2715_Power_Supply_Removal/