Samsung LE32M87BD - stuck in standby - blinking LED

[tom66]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

Check the 24V for the inverter connectors, the readings are rather odd.

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

5 pins all at 24v

[selldoor]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

Is it me or is one of those capacitors on the power supply slightly bulging?

Sorry to labour this but Tom did you mean the one just above the BIG cap.
It looks odd to me - the cover looks wrong and tipped so could be pushing the bottom?

Its also a 50v so could be the startup cap which might cause this?

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

can you lable my photo then i will take you a close up picture of it

the back light has just got to the point where it stays on and the voltages have changed

the 12.05 v are now a steady 12.7

[tom66]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

So not dropping out any more?
Sounds like main board fault - all voltages working OK.

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

its only ok when the back light is on, when its trying to power up - ie led blinking the votages are low

in fact its got worse - they are now 0.07

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

that was it in standby ( led constant )

when i tried turn on it went back to flashing 5 times then back light on for a sec and round and round

voltage back to 12.0 when trying to start - 12.7 when backligh stays on

[anotherdude]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

try giving the main board a bit of heat near the shielded area, had similar before out of these models

might not be that but have had it before and won't do no harm to try

[selldoor]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

can you lable my photo then i will take you a close up picture of it

yup.

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

Ok progress

I replaced the cap suggested by selldoor - no change

I then tried resetting the eprom - no change

I then tried the hair dryer on the top left shield as suggested by anotherdude - success the tv now comes on and it works fine

Now i know its the main board problem but how do i permanently fix it as when it cools down again it dosnt come back on ?

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

cost of a new main board would take make this un-economical also there isnt any, is this some sort of cap or something i can replace ?

[tom66]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

Samsung main boards are never easy to fix. Most likely you would be looking at a problem with the soldering under the processor, like in the case of Xbox 360/PS3. You can try a reflow, but longevity is not guaranteed.

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

any simple way to reflow - i have heard of oven baking but there is alot of plastic

[tom66]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

I would only use hot air on the processor directly - oven reflow is far too imprecise and unstable IMO.

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

so hot air gun directly to the chip ? - do you know how the shield comes off ?

[tom66]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

I don't know how the shield comes off, sorry. It's probably soldered down. Heat should be applied direct to the processor.

[anotherdude]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

it is soldered on, i've had success with a oven bake previoulsy on a 40 model, some flux under the shielded area with the shield removed and then cover the plastics and anything else you don't want to bake in foil, make 4 foil balls and rest the board on it then put it in the oven at say gas mark 4 for 10-15 minutes at most

not a great idea but only worth it if you have no other option or don't want to pay out for the board

these bordeaux models seem plagued with this, just to add further i've tried before with a heatgun and never worked permantly whereas the oven method has worked for me, plus a heatgun is giving uneven heat depending on how long you focus on the spot for flexing etc may occur whereas the oven is a steady heat

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

in the oven now let you know how i get on

[noledud]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

still no change so its either wait for a cheep board or bart out the TV

[mmartell]

Re: Samsung LE32M87BD - stuck in standby - blinking LED

Mmmm... electro-cookies