-
Last edited by sienoki; 03-07-2012, 12:07 PM. -
Re: Acoustic solutions LCD26761HDF no backlight
What I mean is that you can use small value resistor in place of the fuse. Sometime it is referred to fusible resistor, very common usage in place of the fuse.Last edited by budm; 03-07-2012, 12:26 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
Disregard the R925, that message was for another person in another thread, sorry, too many threads to reply to.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
I think he said 2.2 ohm not kilo ohm
They are very small - see http://cpc.farnell.com/phoenix-passi...70?Ntt=re03770
or These for the 2.2
http://cpc.farnell.com/phoenix-passi...71?Ntt=re03771Last edited by selldoor; 03-07-2012, 12:31 PM.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
Put 2.2 Ohm in place of the fuse for now.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
I jumped it for now as ive no fuses etc
http://i1068.photobucket.com/albums/...5/P1000929.jpg
And its working
...thx for being very patient with me..im a very very slow learner lol...if you guys lived near by it would be beers all around..im gonna get them fuses from selldoors link tommoz...so TOM..BUDM..SELLDOOR
&again..thx
Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
As the PSU puts out about 4A remember to replace it sooner or later or you will have a mess of melted wire to fix if something goes wrong.I jumped it for now as ive no fuses etc
http://i1068.photobucket.com/albums/...5/P1000929.jpg
And its working...thx for being very patient with me..im a very very slow learner lol...if you guys lived near by it would be beers all around..im gonna get them fuses from selldoors link tommoz...so TOM..BUDM..SELLDOOR&again..thxPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
Too bad you DID NOT tell us that you did not check to see if it is putting out the 24vdc after the IC is replaced! I am begining to wonder if you do have the 24vdc all along but the problem was a blown fuse for the Inverter controller circuits.
That is OK, now you know a lot more than before! I am just glad to be able to do remote troubleshooting.
Cheers!Last edited by budm; 03-07-2012, 01:32 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
-
Re: Acoustic solutions LCD26761HDF no backlight
When i first got this set there was no 24v reading at the inverter pin out on psu..with or without inverter lead pluged in..so that IC must have been bad & needed replacing as well as the fuse...was so close to throwing towel in & telling my m8 that he needs another psu..total cost should be 5pounds with the fuses added..so once again you guysyou guys fixed this set i was the 1 sh**ing it with multimeter..lol
Comment
-
this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
I bought this p2210f dell monitor to fix. Schematic is the same as p2210.
Behaviour is that monitors comes on but then backlight switches off almost instantly. If I look with flashlight I can still find the "No signal message". So definitely a backlight issue. Trying to advance the issue I proved that the protection circuit is switching off the backlight by shorting out C3 and resistor to disable the INL chip then re enable by removing the short.
This is where it gets interesting. When I disassembled the monitor to solder leads on c3 capacitor I noticed the backlight flickered... -
Hello all,
Am trying to figure out this backlight issue with this A1990 Macbook Pro.
Tests performed:
There is no backlight even with a good screen.
Backlight IC is receiving the correct support voltages.
Fuse F8400 ok
Current sense resistor R8400 ok
Backlight IC is receiving 3.3V on enable pin.
Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
Backlight IC receiving 5V from PP5V_G3S
Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
I2C_BKLT_SCL and I2C_BKLT_SDA both measure... -
Hi this oldie had no backlight .after replacing caps on 24v rail ,
still no b/l this uses inverter type:1315 B1-16A,
im sure ive come across the same inverter in a samsung possibly le32r88bd ?
all t/x in board test ok ,so i fitted 15k and led to pin 4 of oz964gn ic
this allows protect to be temporary overridden.
b/l now comes on
but the left hand side of pic is gradually darker than the right side
i have the cct for the tv
but it does not have inverter cct.
i opened it up to inspect the ccfl tubes
and they dont have any... -
Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone...
Comment