Samsung le40r88bd Clicking, All caps tested ok

[Easky15]

Hi, I have a samsung le40r88bd which keeps clicking and will not fully power up, I removed all the capicitors and they all tested ok, I'm guessing it's still the power board at fault, Is there any other components which would cause clicking ??

[tom66]

Re: Samsung le40r88bd Clicking, All caps tested ok

Check all supply voltages from PSU are good or bad, before considering a bad power board.

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

Lots of the supply voltages are either lower than they should be or completely dead??

[tom66]

Re: Samsung le40r88bd Clicking, All caps tested ok

So, there should be a pin marked 13V, among others, what do you see on it?

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

So, there should be a pin marked 13V, among others, what do you see on it?

Ok sorry i was doing it wrong the first time, I thought i had to remove the cable going from the main board to the power board to be able to test them, All voltages seem ok but when it clicks the 5v, 12v and 13v all seem to cut out then it clicks again and they come back on,

[tom66]

Re: Samsung le40r88bd Clicking, All caps tested ok

That is expected with the relay click, to me it sounds like the main board is shutting off the voltages. What you can try is unplugging that connector from the main board end. The backlight of the LCD should come on and the voltages should all remain steady.

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

That is expected with the relay click, to me it sounds like the main board is shutting off the voltages. What you can try is unplugging that connector from the main board end. The backlight of the LCD should come on and the voltages should all remain steady.

Just check i've unpluged the correct wire, all voltages showing dead with that cable out, and no backlight..

[tom66]

Re: Samsung le40r88bd Clicking, All caps tested ok

You may have to place a test jumper then. Please get the BN44-xxxxxx number off the power board so I can look up schematics.

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

You may have to place a test jumper then. Please get the BN44-xxxxxx number off the power board so I can look up schematics.

BN4400165ASE38BBT2765

Thanks.. ;-)

[120volts]

Re: Samsung le40r88bd Clicking, All caps tested ok

I'm curious how you tested the Caps?

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

I'm curious how you tested the Caps?

fleabay item no; 360669785446

Not the best but does the job. Did you think i used a multimeter?? :-) I'm not that bad...lol

[budm]

Re: Samsung le40r88bd Clicking, All caps tested ok

With all the board connected but the power switch is not activated, what do you have at the 6.2VSTBY output pin? Steady 6.2VDC?
http://assets.shopjimmy.com/media/ca...bn4400165a.jpg
BTW, BN44-00167x SCH is pretty close match to the BN44-00165
If 6.2VSTBY is steady, then you can leave the cable disconnected between the power supply and the main, then use 1K resistor between 6.2VSTBY and POWER ON_OFF PIN 1 of CN801, the relay should click and stay on, the DC voltage on the large main filter cap 450vdc should jump up to around 390vdc.

[Dang]

Re: Samsung le40r88bd Clicking, All caps tested ok

Hi, is this not just a simple case of a corrupted eeprom, in need of resetting via pins 5 and 6? I've had this clicking on and off after a caps change twice before and both times it was the above that got it working again, although on the second time the service menu needed a lot of work to get it back to normal.

[tom66]

Re: Samsung le40r88bd Clicking, All caps tested ok

It sure sounds like that.

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

Hi, is this not just a simple case of a corrupted eeprom, in need of resetting via pins 5 and 6? I've had this clicking on and off after a caps change twice before and both times it was the above that got it working again, although on the second time the service menu needed a lot of work to get it back to normal.

Thanks Dang, exactly what do i need to do to pins 5 and 6 to reset the eeprom??

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

With all the board connected but the power switch is not activated, what do you have at the 6.2VSTBY output pin? Steady 6.2VDC?
http://assets.shopjimmy.com/media/ca...bn4400165a.jpg
BTW, BN44-00167x SCH is pretty close match to the BN44-00165
If 6.2VSTBY is steady, then you can leave the cable disconnected between the power supply and the main, then use 1K resistor between 6.2VSTBY and POWER ON_OFF PIN 1 of CN801, the relay should click and stay on, the DC voltage on the large main filter cap 450vdc should jump up to around 390vdc.

Right, on this set the STB is shown as 5.2 not 6.2 and it remains constant even while relay is clicking, As i said before i'm new to all this and so i'm not very familiar with using resistors yet and have none lying about, I do have a s*it load of electronic goods lyin arround so if you could tell me the colour of bands i'm lookin for then i could try look for one then try use it between the STB 5.2V and power_on_off pin 1, Thanks again.. ;-)

[Dang]

Re: Samsung le40r88bd Clicking, All caps tested ok

Thanks Dang, exactly what do i need to do to pins 5 and 6 to reset the eeprom??

I would listen first to what these guys have to say about your PSU, but I do suspect this is your issue.

You will need two 20cm or so lengths of a fine gauge wire, a thin stereo speaker wire will do, you'll then need to remove your main board and look roughly top left on the back for a small 8 pin IC, it does say eeprom somewhere near it, now counting anti clockwise from the top left find pins 5 and 6, obviously bottom two on the right, you'll need to very carefully solder each 20cm length of wire to each pin making sure not to short them, once done support the wire with some electrical tape and replace the board plugging everything back in. Now the hard part, hold together both ends of the wires then turn on the tv from the mains and at exactly one second release them, the Tv should go to standby, if not repeat the process(this can take a number of times but you might be lucky, this worked on the second time with the last set I did), now simply use your remote to enter the service menu, from stand by press: INFO/MENU/MUTE/POWER, choose option 2 and make sure the settings look something like what you'll find here, post 18: http://www.avforums.com/threads/sams...ch-on.1303522/, you'll also need to go to number 8 and check that the tuner is set to "AUTO", then number 12 to reset your Tv back to factory defaults.

Only press "down" or "up" and the "enter" button to enter the required field and the "return" button to exit back to the previous menu, powering it off will save the settings.

Things to watch for are the HDMI HP DLY, on the last one I did this was way over at 63 causing the third HDMI port to disappear, actually turned out the counter would only go up to 48 or 49 so just a little out, this should be around 9 to 12, also screen type but post 18 of the above web site will help, good luck.

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

Dang ya legend, It's working but i'm stuck on a wee bit here, in the le40r8788bdx.txt file it says to set PDP FILT = 50” Problem is mine is set at 33 and its greyed out and wont let me change it, Should i just carry on ignoring this or is there a way to change it.?? ;-)

[Easky15]

Re: Samsung le40r88bd Clicking, All caps tested ok

Just ignored it, TV is now working sweet, Thanks so much all who helped answer questions,

[budm]

Re: Samsung le40r88bd Clicking, All caps tested ok

Dang, thanks for the info!
Easky, great to hear it is working.