Matsui 42 inch LCD stuck on standby Blue light

[newtothis]

Re: Matsui 42 inch LCD stuck on standby Blue light

Unless you want to learn how to repair boards I would suggest replacing the entire PSU.

You said it before me

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

can you remove the ic to see how bad it is? have you got a soldering iron solder sucker/solder braid etc.

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

I actually wouldn't mind learning how to repair them, I get about 30 - 40 sets a month all faulty, I already bought the board but ill try removing it now anyway, Yeah i have an atten 8586 hot air/soldering station and a scottle ir pro sc v4, Got it to do xbox and ps3 repairs but rarely used it.

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

All the gear.. No idea.... :-)

[tom66]

Re: Matsui 42 inch LCD stuck on standby Blue light

Use wick and solder sucker to take that off, not hot air.

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

hope the board fixes it when you get a minute remove the ic so we can see the damage under/around it.wish i could get 30 to 40 sets a month here in the uk.

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

Removed.. :-)

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

ill cancell the board still if its fixable... :-)

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

im not sure about the burnt pin area maybe budm or tom or someone experienced will advise if repairable the whole area by that ic looks like its had liquid spilt on it looks sticky/wet? maybe thats what blew the ic.

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

the whole area by that ic looks like its had liquid spilt on it looks sticky/wet? maybe thats what blew the ic.

I haven't cleaned the flux off after removing it if thats what you're looking at??

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

i was looking at post 3 or 4 picks maybe that area was just really dirty around that area someone will along to advise youabout the pin burn area but for now at least u have a board on order.

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

Ok, Thanks for your help vinceroger69

[newtothis]

Re: Matsui 42 inch LCD stuck on standby Blue light

Ok.

Check for continuity between the red points.

Check Diode at blue points.

Check each resistor at purple points... These should all be 1M ohm

EDIT *** forgot to add image lol, Check next post

[newtothis]

Re: Matsui 42 inch LCD stuck on standby Blue light

Test points

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

Ok so i recieved the new board today and added it and still i have the blue standby light.. ?? Anyone any ideas where i check next

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

new board could be faulty as well just found this worth a check.
17PW16-2. Also used in TV's by Sanyo, Bush, Hitachi, Vestel.

Fault symptoms: Stuck in standby, main supply will not start up, no backlight.

Solution: Found rectifier diode short circuit: D866 on the (unused on mine) 30v supply. 3A rectifier. Was loading the supply and caused shut down.
also found this
TV is no longer stuck in standby.
A combination of stupidity and nearly dead remote batteries. DUH!
Seems with this TV turning it on at the switch on the TV always puts it into standby, you then have to power it up with the remote..

[Easky15]

Re: Matsui 42 inch LCD stuck on standby Blue light

Just tried the remote, Also no joy.. Could the main board cause this kind of fault or is it definately a bad psu. I have the old one to possibly take parts from to repair it but the thing is i paid for a working board so shouldn't have to, if its definately that at fault i will return it and buy another.. :-)

[vinceroger69]

Re: Matsui 42 inch LCD stuck on standby Blue light

well i would for a start test all voltages on the connectors and see which you and whats missing write a list ie conn 1 pin 1 5volt- reads 5.3 volt etc then we should be able to work out if its a psu fault or mainboard fault

[selldoor]

Re: Matsui 42 inch LCD stuck on standby Blue light

Just tried the remote, Also no joy.. :-)

Is the remote working does led flash on tv.
Part test is to look at remote lens through digital camera.

[Cobblers]

Re: Matsui 42 inch LCD stuck on standby Blue light

new board could be faulty as well just found this worth a check.
17PW16-2. Also used in TV's by Sanyo, Bush, Hitachi, Vestel.

Fault symptoms: Stuck in standby, main supply will not start up, no backlight.

Solution: Found rectifier diode short circuit: D866 on the (unused on mine) 30v supply. 3A rectifier. Was loading the supply and caused shut down.
also found this
TV is no longer stuck in standby.
A combination of stupidity and nearly dead remote batteries. DUH!
Seems with this TV turning it on at the switch on the TV always puts it into standby, you then have to power it up with the remote..

I have just spent 3 hours going round in circles checking voltages on a acoustic solutions lcd42761f1080p. I had no remote and bought it as faulty for £20. After reading this i tried the rc1205 i have for my hitachi and it came on staright away. How strange that the side button wont turn the set on. Do you think it is a fault with the set or is this by design?