Insignia BRDVD4 powers on with blue light blinking then shuts off.

[infringer]

I am unsure what is wrong with this unit but ... I will say the transformer seems awfully noisy. Symptoms are the power led blinks blue then shuts off I am curious as to what the cause is but I would be guessing it is likely a power supply related issue because the standby lights work I would say it would be something in the non standby circuit is not getting the proper voltage or something along that line as I said the transformer is louder then I would suspect it would be but the problem with this is it is labeled BCK02 and the company it appears is OQO that makes it and I can find zero information on this unit but I am willing to replace it on a hunch is this normally a high failure item or would there be no power at all and a blown fuse if it were faulty?

I guess I dunno much but am trying to learn and figured this broken item would be great to learn from... I will likely be ordering a good one with good boards so I could narrow it down to the power board or the main board. Everything is just based upon a hunch currently until I learn some more. But I really have the need to learn a bit more about these circuits.

I will include a picture of the PSU just for reference in case it helps.

[selldoor]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

picture is not big enough can you get it to just less than 2mb and also post one of the back of the board

Re the green caps Teapo or what.

[999999999]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

Agreed, larger pic would be nice and is that a picture of YOURS or only an example pic from someone else? Basic method would be checking whether the output rail voltages seem to be stable and in the range what they are connected to would need... with and without the load(s) connected.

[infringer]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

OK got out the good camera and took some pics maybe this would help.

[selldoor]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

@999999999 - good spot. not his board then!

@infringer - so what make are the caps.
Duff high ripple caps might make the transformer noisy.

Test the voltages as 999999999 suggests and post the results along side
the expected results as shown on the board.


EDIT haha JUNZL - never heard of them

What is the big cap

[infringer]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

Big cap is 100uf BHA Y style CDT03 rated at 105c hrmm so how often do inductors go I guess I am having troubles pinning exactly where the problem lies upon visual inspection all fuses on the main board and the Power Supply seem to have continuity and none of the Caps look like they are in bad shape. But I will have to get out the LCR meter to check for sure I just figured there might be a problem area that would be simplistic to start at without having to go through everything being that there are some old timers with a knack for this stuff on this forum. I'm learning I hope to be able to find them problem areas quickly in due time but for now my hunches are newbieish.

[infringer]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

dang LCR meter crapped out I forgot only reads 1 on everything its toasted no fuse and was used on a 300v cap when item was plugged in only rated for 30v pretty useless now but got an extra set of leads for my multimeter if I need it. Oh well live and learn at least that reminds me I still need a new LCR meter dunno why I figured it was 300v hadn't used it for a while and didn't look to check just assumed.

[selldoor]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

Cant find anything at all on BHA caps- Id suspect as poor. Unless you have an ESR meter testing the caps will not prove much unless you find one thats shorted.
Id go for testing the output voltages and see if they are steady. perhaps
using automotive bulbs to put a load on. That would then give you an indication as to whether the fault lies in the power supply or on the main board.

Having read the above I would remind you of two simple rules
Measure voltage with power on
Measure resistance with power off (at lest 5 minutes)

[infringer]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

15.50 scored me both of the boards so I will test if it is only the power board when I get the boards in a week or better... Until then I will continue to work on a few other projects I got going poor mans projector fix amongst other things also waiting on parts 42" Vizio waiting on a main board. One PS3 here that needs a new sled I'll probably get that one up and running yet tonight. Other then that everything is fixed I think wish I could find and endless supply of broken electronics lol! All is good practice.

[infringer]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

it was the power board there is a 4 pin component next to the transformer that goes and takes out the big capacitor on the board...

[999999999]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

^ What? The only 4 pin component I see next to the transformer is an optoisolator, I'm not seeing how its failure would take out a capacitor nor how the cap would be taken out but not have vented or exploded.

[budm]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

Yeah, that does not make sense, the large cap is exposed to the rectified DC from power line by the bridge and could not careless what happen to the OPTOISLATOR for the feedback circuits to maintain the output voltage.
Unless he meant the Bridge rectifier (4-pin) next to the Common mode line filter choke.

[tom66]

Re: Insignia BRDVD4 powers on with blue light blinking then shuts off.

I've had a shorted bridge take out a cap, but only on the second time round (after replacing the fuse)... the first time it seemed to have survived.