SONY KLV-32EX400 No Power No LED on

[masoodlodhran]

After Power fluctuation my lcd stop working.

I open the lcd, it have Power Board G2LE.

I measure the voltage at connector CN6401

Pin - DC Volt
1 = 3.28v
2 = 3.28v
3 = 3.22v not changed when press on/off button
4 = 12.65v
5 = 0v
6 = 0v
7 = 0v
8 = 12.65v
9 = 12.65v
10 = 0.15v
11 = 0v
12 = 0v
13 = NC
14 = 0v
15 = 0v

Help in this regard, so that i on my lcd.

[budm]

Re: SONY KLV-32EX400 No Power No LED on

No pin names to tell us what those pins are?

[masoodlodhran]

Re: SONY KLV-32EX400 No Power No LED on

Pin - Function - Measure DC Volt
1 = Standby - 3.28v
2 = AC Off Det - 3.28v
3 = Power On - 3.22v not changed when press on/off button
4 = Audio 12v - 12.65v
5 = Audio 12v GND - 0v
6 = Reg12v GND - 0v
7 = Reg12v GND - 0v
8 = REG12V - 12.65v
9 = REG12V - 12.65v
10 = BL-ERR - 0.15v
11 = BL-On - 0v
12 = Dimmer - 0v
13 = NC
14 = T-con-VCC 12v - 0v
15 = T-CON-ON - 0v

[anmol]

Re: SONY KLV-32EX400 No Power No LED on

please write more detail. standby red led is on? or power on green led is on.
any fleshing red led ?

audio on?

11 = BL-On - 0v = no backlight.

you write at first post. 14 = 0v

now 14 = T-con-VCC 12v - 0v

15 = T-CON-ON - 0v
if tcon on volt is 0v. it is not possible to output T-con-VCC 12v - 0v.

you can check backlight on by 100R res. make jumper Pin 1 to pin 11 for check backlight on.

wbr

[masoodlodhran]

Re: SONY KLV-32EX400 No Power No LED on

No Standby Red LED on, No Power on Green LED on, no LED Flashing.


Pin No. is 14 = Pin Function is T-con-VCC 12v - and i measure 0v on it.

[anmol]

Re: SONY KLV-32EX400 No Power No LED on

disconnect lvds cable from main board ( Not from tcon side.) and check again. also check backlight on by 100r resister jumper from pin 1 to pin 11.

[Andrew F. Ali]

Re: SONY KLV-32EX400 No Power No LED on

Follow instructions anmol Post# 6 and tell what you see.

[budm]

Re: SONY KLV-32EX400 No Power No LED on

G2le

[masoodlodhran]

Re: SONY KLV-32EX400 No Power No LED on

Remove connector from Main Board. Place resistance 100R from 1 to 11 No. pin.

Back light turns on.

[Andrew F. Ali]

Re: SONY KLV-32EX400 No Power No LED on

OK. So now we may have a Main Board issue.

[budm]

Re: SONY KLV-32EX400 No Power No LED on

No blinking codes?
So far the main board is not sending the
11 = BL-On - 0v
12 = Dimmer - 0v
15 = T-CON-ON - 0v
So your main board is not functioning.

[masoodlodhran]

Re: SONY KLV-32EX400 No Power No LED on

On Main board (BAA1A), Where should i check the proper supply of Micro controller etc.
if possible with picture, please.
any one have service manual & Schematic of Main Board please also post.

[budm]

Re: SONY KLV-32EX400 No Power No LED on

Try this site:
http://elektrotanya.com/?q=showresul...at2=schematics

[masoodlodhran]

Re: SONY KLV-32EX400 No Power No LED on

Where should i purchase Main board (BAA1A), guide please.

[Herry Patel]

Re: SONY KLV-32EX400 No Power No LED on

I have the same board for Sony LCD (KLV-26EX300) TV BAA1A (A-1768-177-B 1047687) and G1LSE Power board. Ihave Same issue from the power board i get only 3.3v Standby

same as this thread.
Pin - Function - Measure DC Volt
1 = Standby - 3.28v
2 = AC Off Det - 3.28v
3 = Power On - 3.22v not changed when press on/off button
4 = Audio 12v - 12.65v
5 = Audio 12v GND - 0v
6 = Reg12v GND - 0v
7 = Reg12v GND - 0v
8 = REG12V - 12.65v
9 = REG12V - 12.65v
10 = BL-ERR - 0.15v
11 = BL-On - 0v
12 = Dimmer - 0v
13 = NC
14 = T-con-VCC 12v - 0v
15 = T-CON-ON - 0v

Tried mentioning BL ON through sorting Pin 1 to Pin 11 using 100 Ohm resistor. but BL not on.

[Herry Patel]

Re: SONY KLV-32EX400 No Power No LED on

please write more detail. standby red led is on? or power on green led is on.
any fleshing red led ?

audio on?

11 = BL-On - 0v = no backlight.

you write at first post. 14 = 0v

now 14 = T-con-VCC 12v - 0v

15 = T-CON-ON - 0v
if tcon on volt is 0v. it is not possible to output T-con-VCC 12v - 0v.

you can check backlight on by 100R res. make jumper Pin 1 to pin 11 for check backlight on.

wbr

I have the same board for Sony LCD (KLV-26EX300) TV BAA1A (A-1768-177-B 1047687) and G1LSE Power board. Ihave Same issue from the power board i get only 3.3v Standby

same as this thread.

Pin - Function - Measure DC Volt
1 = Standby - 3.28v
2 = AC Off Det - 3.28v
3 = Power On - 3.22v not changed when press on/off button
4 = Audio 12v - 12.65v
5 = Audio 12v GND - 0v
6 = Reg12v GND - 0v
7 = Reg12v GND - 0v
8 = REG12V - 12.65v
9 = REG12V - 12.65v
10 = BL-ERR - 0.15v
11 = BL-On - 0v
12 = Dimmer - 0v
13 = NC
14 = T-con-VCC 12v - 0v
15 = T-CON-ON - 0v

Tried mentioning BL ON through sorting Pin 1 to Pin 11 using 100 Ohm resistor. but Back light not on.

Standby indicator not on (Green or Red).

[nomoresonys]

Re: SONY KLV-32EX400 No Power No LED on

Try it again with about a 1k resistor.

[nomoresonys]

Re: SONY KLV-32EX400 No Power No LED on

Check the fuse on the inverter board.

[dick_barton]

Re: SONY KLV-32EX400 No Power No LED on

What is the voltage at Pin3 (Power_On) when the mainboard is disconnected from the power supply?

[budm]

Re: SONY KLV-32EX400 No Power No LED on

I have the same board for Sony LCD (KLV-26EX300) TV BAA1A (A-1768-177-B 1047687) and G1LSE Power board. Ihave Same issue from the power board i get only 3.3v Standby

same as this thread.
Pin - Function - Measure DC Volt
1 = Standby - 3.28v
2 = AC Off Det - 3.28v
3 = Power On - 3.22v not changed when press on/off button
4 = Audio 12v - 12.65v
5 = Audio 12v GND - 0v
6 = Reg12v GND - 0v
7 = Reg12v GND - 0v
8 = REG12V - 12.65v
9 = REG12V - 12.65v
10 = BL-ERR - 0.15v
11 = BL-On - 0v bad
12 = Dimmer - 0v bad
13 = NC
14 = T-con-VCC 12v - 0v
15 = T-CON-ON - 0v bad

Tried mentioning BL ON through sorting Pin 1 to Pin 11 using 100 Ohm resistor. but BL not on.

You said you only get 3.3V Standby but the chart shows Voltages on other pins also.
Also show us pictures of the whole backside of the TV showing all the boards.