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Repair kit for RCA 42LA45RQ power AYL400207 - shutting down, not powering on problem

If your RCA 42LA45RQ shuts off immediately or shortly after being turned on chances are good it is because of the power supply board AOYUAN AYL400207. You can use this repair kit to remedy the problem.

In stock


This repair kit addresses a common failure in power supply board AOYUAN AYL400207 / AYL400208 used in RCA 42LA45RQ and possibly other LCD TVs.

Please read the listing carefully and in full to avoid possible confusion.

Note 1: Before placing an order please ensure that the board in your TV is the same as the one in this listing! It is common for manufacturers to make significant modifications in TV internals without reflecting the change on the label on the back.

Coppell TV Repair LLC will not be responsible for orders placed by mistake!

Note 2: You may want to check the disc capacitors on the board used to connect to the CCFL lamps; is location would naturally help refer to it as "invereter board", but in reality the inverter itself is in the AYL400207 module; this is more of a distribution board, with lots of capacitors along its length.
Sometimes those capacitors burn and cause the TV to shut down.
This can happen independently or along with failures on the AYL400207 SMSP.

The capacitors included in this kit are not exact match, but are fully functional replacements for the ones found on the CCFL backlight inverter helper board.


The most common failure symptom and the one that this kit cures is usually manifested by the TV coming on for a few seconds and then shutting itself off.

Over time this can get to not ever showing backlight and directly shutting off.

Unfortunately the same symptoms can be observed from other failures, so we can not guarantee you that this kit will resolve the problem based on symptoms alone.

Visual inspection of the four small blue capacitors located on the outer side of one of the two large high voltage transformers may sometimes reveal swelling or even burning, but not necessarily.

Measurements with DMM are not guaranteed to help either as the problem may only show itself under load conditions (high voltage and high frequency).


Brand new replacement for components C26,C27,C28 and C29.
Please note: we have seen different batches / versions of the board come with different values for those capacitors. On some boards C26 and C29 have same value, which is different from C27 and C28.
We send 4 capacitors of same value as we have seen the OEM do in other versions of the board.
Do not be alarmed, this is verified and know to work well; if your board doesn't then it simply has more problems. (sorry!)


This is as easy a repair service as they come, but it still requires some basic soldering skills.

You will need an iron - almost any will do, some solder and a Philips screw driver so you can get to the board.


The repair kit for AYL400207 comes without warranties of any kind of success, explicit or implied.

We have repaired several RCA 42LA45RQ with the same problem and are releasing the kit based on our knowledge and experience in hope it can be a quick and cost effective way to help others, but we can not and do not guarantee it will solve your problem.

Like with most of our repair kits returns are NOT accepted.


Listed price includes shipping with USPS First Class mail anywhere within continental USA or to anywhere where the same postage applies.

Please contact us if you want this shipped overseas.

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