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- [HURRY] I need BIOS file to fix ENVY 27-p100 computer

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07-09-2025 08:58 AM
【HP ENVY 27 (TPC-P045-27) No Boot, Black Screen, Fan Spinning. Suspected CMOS/BIOS Failure, Seeking BIOS File and Technical Support.】
(Product Information):
Product Model: The only model number I can see on the chassis is TPC-P045-27, which I believe corresponds to the ENVY 27-p100 series. More details may be visible in the attached photo.
- Operating System: None installed at the moment.
(Detailed Problem Description):After a long period of disuse, my All-in-One PC fails to boot. The screen remains black with no display. The power indicator LED is solid on, so I have disassembled the computer to perform diagnostics.
(Troubleshooting Steps Taken):
My troubleshooting process has been as follows:
My initial suspicion was a BIOS error, so I performed a CMOS reset using the motherboard jumpers after disconnecting power, but the issue persisted.
I then used a multimeter to check the circuitry. The resistance on the inductor for the CPU Vcore rail measured several hundred ohms without a CPU installed. After installing a CPU (the original was an Intel 6400T; I swapped it with a known-good 6100T to rule out CPU failure, but the fault remained), the resistance dropped to below 20 ohms, which seems normal.
I tested brand new sticks of DDR3L RAM in different slots, but the screen still failed to display, while the fan continued to spin.
I disconnected all peripherals and powered the motherboard in a minimal configuration using a bench power supply. The current draw stabilized at approximately 0.65A and would not proceed further into the boot sequence.
Based on this, I began to suspect that a failed CMOS/BIOS chip was preventing initialization. I desoldered the CMOS chip and attempted to read it with a CH341a programmer on two different computers, neither of which could detect the chip.
Even with the CMOS chip removed, powering on the motherboard results in the same current draw of ~0.65A.
Therefore, my current diagnosis is a failed CMOS chip, which is causing the power-on sequence to halt before the BIOS can be read. I have ruled out the CPU and RAM as the cause of the issue through cross-testing with minimal components.
(Desired Assistance):
I am looking for the following assistance:
I would like to obtain the BIOS.BIN file for this specific motherboard so I can flash it onto a new replacement Winbond chip.
I am looking for a functional replacement CMOS chip for this model, or alternatively, a non-functional donor motherboard from which I could salvage the part. I am willing to cover any postage costs.
I welcome any additional expert advice or discussion with fellow enthusiasts who may have encountered a similar issue.
07-09-2025 10:19 AM - edited 07-09-2025 10:21 AM
Welcome to our HP Community forum!
1.) HP ENVY 27-p100 All-in-One Desktop PC series (Touch) Software and Driver Downloads | HP® Support.
2.) You can purchase a "parts only" motherboard via eBay, but it would be anyone's guess if you actually bought one with a functional CMOS chip. A working motherboard is inexpensive enough, such as this purchase option for under $33: HP ENVY 24-N 27-P INTEL CHIPSET H170 SOCKET LGA1151 AIO MOTHERBOARD 797425-001 | eBay.
3.) In my experience, messing around with chips and capacitors and such often leads to frustration and sucking up time & efforts: replace your motherboard would be my recommendation.
Kind Regards,
NonSequitur777