FAQ
TL;DR: For Philips 49PUS7909/12 eMMC repair, back up 3 partitions (BOOT1, BOOT2, factory_setting). "If these sections cannot be read, full functionality cannot be restored." Use RT809H or raw reads to preserve keys. [Elektroda, sergiy141, post #20463496]
Why it matters: This FAQ helps bench techs and TV repairers decide how to dump, clone, or transplant parts to recover keys and full functionality.
Quick Facts
- Platform: QV14.1E mainboard, LA:715RLPCB0000000401; single LVDS configuration reported. [Elektroda, sergiy141, post #20404860]
- Common eMMC ICs on this board: Toshiba THGBMAG5A1JBAIR or Hynix. [Elektroda, sergiy141, post #20404860]
- Critical backups for full function: BOOT1, BOOT2, and USER p3 (factory_setting). [Elektroda, sergiy141, post #20463496]
- If those sections are unreadable, full functionality cannot be restored on a replacement eMMC. [Elektroda, sergiy141, post #20463496]
- RT809H symptoms: when USER is damaged it may only show BOOT1/BOOT2 and MBR/MPBR. [Elektroda, somalorg, post #20463716]
What dumps do I need to revive a Philips 49PUS7909/12 with a dead eMMC?
Back up BOOT1, BOOT2, and the USER p3 partition named factory_setting. These hold essential data and keys. Factory_setting sits at offset 0x0006000000, size 0x0004000000. Without these sections, you cannot restore full functionality on a new eMMC. Save each region as a separate file for safety. [Elektroda, sergiy141, post #20463496]
Where are the TV’s keys stored — CPU or eMMC?
They reside in the eMMC, specifically in the factory_setting partition. The CPU is not the source for recovering those keys. As one expert put it: "Factory_Settings Here are the keys." Focus your read on that user-area partition. [Elektroda, sergiy141, post #20460181]
Can I use a donor dump from another 49PUS7909/12 to fix mine?
A donor dump will not deliver full functionality. Keys and unique data tie to your original device. "With someone else's dump, the functionality will not be complete." If your original factory_setting is unreadable, expect limitations even if it boots. [Elektroda, sergiy141, post #20463496]
My RT809H only shows BOOT1/BOOT2 and MBR. Is my USER area damaged?
Yes, that symptom points to a damaged user area. RT809H will often list only BOOT1/BOOT2 and MPBR/MBR in such cases. Try alternate connections, ISP rework, or chip-off reading. If USER p3 remains unreadable, full functionality cannot be restored. [Elektroda, somalorg, post #20463716]
How do I dump BOOT1, BOOT2, and factory_setting (p3) with RT809H?
Use this quick procedure:
- Read and save BOOT1 and BOOT2 via the RT809H eMMC menu.
- Perform a raw read at offset 0x0006000000 with length 0x0004000000 to get factory_setting.
- Verify file sizes and keep multiple copies before proceeding.
These three regions underpin full functionality. [Elektroda, sergiy141, post #20463496]
What partition offsets matter most on this board?
The shared map lists 13 partitions (p0–p12). Key ones: p3 factory_setting at 0x0006000000 (size 0x0004000000), p5 boot at 0x000E000000 (size 0x0000C00000), p7 system at 0x000F000000 (size 0x0032000000). Use these as targets for raw reads/writes when cloning or validating. [Elektroda, sergiy141, post #20463496]
Should I transplant both CPU and eMMC from a donor board?
Transplant both only if your original USER p3 cannot be read at all. Full functionality depends on content in BOOT1, BOOT2, and factory_setting. If those sections are irretrievable, keeping a matched CPU+eMMC pair can preserve operation. Otherwise, a new eMMC with original dumps is preferable. [Elektroda, sergiy141, post #20463496]
How do I re-partition or recreate the USER area on a new eMMC?
You don’t need a partitioning UI if you program raw regions by offset. Write your saved BOOT1, BOOT2, and factory_setting (offset 0x0006000000, size 0x0004000000). Then program other partitions as needed using the same map. If factory_setting is missing, full functionality cannot be restored. [Elektroda, sergiy141, post #20463496]
Does anyone share full eMMC dumps for this model?
In the thread, dump sharing proceeded by direct contact. The guidance given was: "Enter your e-mail address." If you seek a dump, post contact details as requested and follow up with the provider. [Elektroda, sergiy141, post #21109493]
Which mainboard variant and eMMC chips are common on 49PUS7909/12?
Reports reference the QV14.1E mainboard, LA:715RLPCB0000000401, with a single LVDS. eMMC ICs seen include Toshiba THGBMAG5A1JBAIR and Hynix variants. Verify your exact board and memory before flashing or transplanting parts. [Elektroda, sergiy141, post #20404860]
Which LCD panel is mentioned alongside this mainboard?
The LC490EQE panel is referenced with the Philips 49PUS7909/12 and frame LA:715RLPCB0000000401. Confirm panel compatibility if swapping boards, as LVDS routing and EDID can vary by panel. [Elektroda, somalorg, post #20401976]
Do I need SDM protection reset pins to recover keys?
No. SDM reset is not required for key recovery. The keys you need are inside eMMC factory_setting. Focus on reading BOOT1, BOOT2, and USER p3. If those sections are unreadable, full functionality cannot be restored anyway. [Elektroda, sergiy141, post #20463496]
