Hi all, I have a Philips 42pfl5609/98 TV that can only stay in standby mode after the power is switched on. TV have a steady red standby light but refuses to turn after pressing the on button. Any help would be greatly appreciated.
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Re: Philips 42pfl5609/98 stuck in standby mode
Upon further inspection, I realized that the P802 connector on the power supply board does output a 3.3V on the third left pin(marked as 3.3VSB) when its on with the rest of the pins at 0V when the TV is in standby mode.Attached Files -
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Re: Philips 42pfl5609/98 stuck in standby mode
3.3VSB should be present the minute you apply AC to the TV.
Since you do have standby Voltage to run the main board, then the main board should send out the P-ON to turn on the rest of the power supply, that P-ON pin DCV should change state when you toggle the power switch.
POWER SUPPLY PCB: 40-IP42CS-PWI1XGLast edited by budm; 06-22-2018, 10:17 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
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Re: Philips 42pfl5609/98 stuck in standby mode
Thanks for your reply bdum! After checking the P-ON pin on the power supply board and the main board i realized that there is no voltage reading at either end of the board. How should i proceed next?Comment
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Re: Philips 42pfl5609/98 stuck in standby mode
You can try verify the power supply function by forcing the rest of the power supply on by using 330 ~ 470 Ohms 1/4W between the 3.3V and the P-ON but you must remove the connector that goes to the main board first. If the power supply is OK then you should see the rest of the switched power supplies come on.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
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Re: Philips 42pfl5609/98 stuck in standby mode
Thank you Budm, I tried what you suggested. I measured the bottom 3 pins of p802 connector (marked as 24v) and managed to get 24v output. What should I do next?Last edited by x0clouds0x; 06-23-2018, 04:35 AM.Comment
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Re: Philips 42pfl5609/98 stuck in standby mode
Without connecting the std-by to the BL-ON and connecting the backlights to test if the backlights are working, I would think you have a Main Bd. problemComment
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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
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Re: Philips 42pfl5609/98 stuck in standby mode
Thanks, Andrew F. Ali and budm! I could get the back light to turn on, so it should be the main board problem. How can I test the main board?Comment
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Re: Philips 42pfl5609/98 stuck in standby mode
It is complex board so you need to find the schematic diagram that matches your board to troubleshoot down to component level.
You can also try heating and cooling the board and the EEPROM to see if it will make any different.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
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The TV is faulty with stuck in Standby RED LED. Can't power the TV.
Before this problem , the TV stuck the picture with artefact , i unplug the AC cable and since the tv is stuck in standby .
All voltage are OK on PSU and main board for regulator. I tried flash firmware 25Q64 with many dumps
But the voltage on power button is 0.6V not 3.3V. When i press power button the voltage up to 0V. I tried to add 5V with Power Supply on 5V_STB and 3.3V on Power... -
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Things I have tried:
1. Tried force booting into Safe Mode by pressing and holding power button for 2 beeps so I could use a reinstallation USB, but the console still boots into Safe Mode with the... -
Just received it today from a friend.
Auto shutdown by the supervisor IC because of an under voltage condition with 12V output rail (dropped to 10.5V)
The same rail also does this when the PSU is in standby mode.
https://ibb.co/5TBkg66
The leakage keeps climbing at a steady rate but slowing down when it reaches over 800mV or so. I didn't measure exactly at what value it stopped or if it's even stopped at all.
What could have caused that?
First time I have seen such behavior.
3.3V and 5V rails don't have the same...
Comment