Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

[DutchDIY]

I have another tv with issues, this one remains in an infinite boot loop but won't display a logo or anything, just backlight for some seconds and then a reboot.

I have added some pics of it's guts.
Any help is much appreciated, thanks everyone.

Edit:
I'm getting 8s of backlight, and smth of a reboot taking 15s to display another 8s of backlight. This repeats itself.

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

wow... can you check is this MB really QF2EU chassis ?? it coast before 8 years more than 3000 €

[DutchDIY]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

wow... can you check is this MB really QF2EU chassis ?? it coast before 8 years more than 3000 €

I picked this up for free 🙈. With remote and wall support even.

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

I picked this up for free 🙈. With remote and wall support even.

check if the MB chassis QF2EU if yes.. then you have on the MB test point SDM shorted with chassis and then plug it in wall it should pass the fault and display diagnostic report

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Chassis QFU1.2E LA

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Chassis QFU1.2E LA

cant be QFU1.2E LA ... xxPFL8708S are Fusion R2 – QF2EU

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

cant be QFU1.2E LA ... xxPFL8708S are Fusion R2 – QF2EU

https://www.badcaps.net/forum/showthread.php?t=75843

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

The weak point in PHILIPS TV models assembled on the QFU1.2E LA chassis is the main SSB board (MainBoard), which usually fails after two years of operation. Its replacement is required.
The cost of the board is quite high, which sometimes raises the question of the feasibility of repairs.
Despite the efforts of the designers to make it difficult or eliminate the possibility of repairing the board, there are still options for restoring it.

Attention masters!!! You should pay attention to the drops of the compound from the bottom of the board. When trying to heat the board or reball BGA chips, the compound must be completely removed. Otherwise, there will be a short circuit of the tracks, which will significantly complicate further repair of the board.

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

https://www.badcaps.net/forum/showthread.php?t=75843

wrong info. he wrote what are on sticker as region chassis. the main chassis code we used Fusion R2 – QF2EU from 2013 not 2014 as he wrote

look on philips firmware archive by toengel under 2013 – xxPFLxxx8

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Philips 60PFL8708S/12

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Philips 60PFL8708S/12

hahaha... man you are still searching.. to let you satisfied download this firmware and inspect it. it is QF2EU-0.173.45.0 (Date published: 2014-01-29)

2022 – xxPXXxxx7 / xxOLEDxx TPM211EA
2021 – xxPXXxxx6 / xxOLEDxx6 TPM211EA, TPM215E, TPN216E
2020 – xxPXXxxx5 / xxOLEDxx5 TPM191E, TPM206E, TPM207E, TPN206E, TPS191E
2019 – xxPXXxxx4 / xxOLEDxx4 TPM191E, TPM196E, TPS191E
2018 – xxPXXxxx3 / xxOLEDxx3 TPM171E, TPM186E, TPM187E
2017 – xxPXXxxx2 TPM171E, TPM172E, TPM177E, TPN171E
2016 – xxPXXxxx1 QM161E, QM163E, QM164E
2015 – xxPXXxxx0 QM151E, QV151E, QM152E, TPN151E, TPN152E, TPM156E
2014 – xxPXXxxx9 TPN149E, TPN141E, QN141E, QN143E, AND1E
2013 – xxPFLxxx8 QF2EU, TPM1013E, TPM1012E,
2012 – xxPFLxxx7 QF1EU, Q554E / Q554M,
2011 – xxPFLxxx6 Q5551 / Q5553
2010 – xxPFLxxx5 Q5551 / Q5553, TPM51E
2009 – xxPFLxxx4 Q5481

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

But QF2EU is not a chassis number, it is the initial firmware name (QF2EU xxxx xxxx) for the QFU1.2E LA chassis.

[DutchDIY]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

The weak point in PHILIPS TV models assembled on the QFU1.2E LA chassis is the main SSB board (MainBoard), which usually fails after two years of operation. Its replacement is required.
The cost of the board is quite high, which sometimes raises the question of the feasibility of repairs.
Despite the efforts of the designers to make it difficult or eliminate the possibility of repairing the board, there are still options for restoring it.

Attention masters!!! You should pay attention to the drops of the compound from the bottom of the board. When trying to heat the board or reball BGA chips, the compound must be completely removed. Otherwise, there will be a short circuit of the tracks, which will significantly complicate further repair of the board.

Is my best bet to find a replacement main board?
Or should I reflow it?

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

But QF2EU is not a chassis number, it is the initial firmware name (QF2EU xxxx xxxx) for the QFU1.2E LA chassis.

lotas you are clever... read the table 3 chassis are in 2013 share one firmware.
2013 – xxPFLxxx8 QF2EU, TPM1013E, TPM1012E,

look on the boards self. tv chassis are different from MB code. this why i asked on the MB code not the TV chassis. because he had boot and no error code BL come on and off.. are absoult different from BGA issue to the post you linked where i asked him from start to do BGA

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

dont kill your tv as you did with samsung... download first the firmware and downgrade it,,, if your screen come on with upgrade every things will be fine. if not you need to check the BL if they come high and low at start up... if they are fine then go to BGA

[DutchDIY]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

dont kill your tv as you did with samsung... download first the firmware and downgrade it,,, if your screen come on with upgrade every things will be fine. if not you need to check the BL if they come high and low at start up... if they are fine then go to BGA

Will try the firmware with USB stick, I have to buy a USB stick first lol. Thanks!

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

lotas you are clever... read the table 3 chassis are in 2013 share one firmware.
2013 – xxPFLxxx8 QF2EU, TPM1013E, TPM1012E,

look on the boards self. tv chassis are different from MB code. this why i asked on the MB code not the TV chassis. because he had boot and no error code BL come on and off.. are absoult different from BGA issue to the post you linked where i asked him from start to do BGA

Mainboard 3104 303 54946 B
3104 313 66186 B

[lotas]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Will try the firmware with USB stick, I have to buy a USB stick first lol. Thanks!

Look, not with all usb flash drives the update will start (they just won't be seen by the TV), you need to look for old ones for 1-2 Gb

[DutchDIY]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

Look, not with all usb flash drives the update will start (they just won't be seen by the TV), you need to look for old ones for 1-2 Gb

I found one in my drawer, 4gb, will try.

[Diah]

Re: Philips 60PFL8708S/12 On Infinite Boot Loop No Logo, Only Backlight

I found one in my drawer, 4gb, will try.

the USB should be bootable MBR ..
how to do USB stick MBR with windows DISKPART

Open command terminal and type DISKPART

# Show all disks (aka drives, like hard drives or removable media).
DISKPART> list disk
 
# Select a disk to operate on.
DISKPART> select disk [number identifying USB flash drive]
 
# Delete all partitions, resulting in a blank disk.
DISKPART> clean

# If the USB drive is using the GPT layout, the "list disk" command output
# above will show an asterisk in the last "Gpt" column. If this is the
# case, issue this command to change it to the MBR layout.
DISKPART> convert mbr

# Create a primary partition (using MBR).
DISKPART> create partition primary

# Show all partitions (should just be the one newly-created partition).
DISKPART> list partition

# Select the primary partition to operate on (only 1 partition exists).
DISKPART> select partition 1
 
# Make the primary partition active (aka bootable).
# This command will fail if the USB drive is using the GPT layout.
DISKPART> active
 
# Format the active primary partition using FAT32.
# To do a full format, instead of a quick format, omit the "quick" flag.
DISKPART> format fs=fat32 quick
 
# Assign a drive letter to the primary partition
# (just in case Windows didn't already do it).
DISKPART> assign

# Quit DiskPart.
DISKPART> exit