Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
I measured voltage over G1901 as per your instructions – it is in fact 3V.
I gathered additional info about events before failure. Laptop was on battery charging a phone over USB port and the laptop battery run off. After this the laptop could not be turned back on.
Can some PMIC in USB port area be the culprit for laptop not turning on?
BIOSrookie
Member
Last Activity: 11-08-2022, 06:56 AM
Joined: 07-21-2021
Location: Graz
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
I tried to make as clear photo as possible, but PCB coating is very reflective....Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
I found the triangle you mentioned and measured the voltages, see attached picture.
What is the next step?...Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
I tried to check RTCRST# & SRTCRST# on PCH (chipset) testpoints, but all were 0V (I attached picture where I measured). Should I check other testpoints?
I do have dc supply, I cut old connector from non-working adapter and tried to apply voltage through it to the board. Since no lights turned on, I tried again with working adapter and figured out that original adapter has three lines = 19V, 5V and ground. Because I only have one dc supply I am not able to supply two different voltages into the board....Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
When power button is pressed, power LED, charge LED and caps lock LED blink white once.
But only when button is pressed, blinking does not repeat unless button is pressed again.
Could this based on HP LED error codes indicate a faulty processor?Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
Could you please help me with what and how should I check in RTC circuit?...Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
I measured voltages on large grey coils with adapter plugged in, see pictures attached....Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
HP Spare: 734084-001
I found the schematics on the forum.
[url]https://www.badcaps.net/forum/showthread.php?t=89556&highlight=48.4YW05.011[/url]
There is 19V present on the main power rail.Re: HP ProBook 450 G1 PN: E9Y39EA no...in power rail.Re: HP ProBook 450 G1Leave a comment:
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Re: HP ProBook 450 G1 PN: E9Y39EA not powering on
As I said, the computer does not power on, I cannot run a battery calibration as you suggested.Leave a comment:
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HP ProBook 450 G1 PN: E9Y39EA not powering on
I have a problem with notebook HP ProBook 450 G1 PN: E9Y39EA - it doesn't power on.
When I plug in the original adapter the [B]charging LED[/B] flashes once white and twice orange (white – orange – orange). I get the same result with different adapter and if I remove processor.
I tried HP recommended routine, removing main battery, CMOS battery, holding power button 12 seconds etc., with no improvement.
Has someone experience with this problem? I checked HP documents and charging LED error codes are not mentioned anywhere.
Thanks.I have -
Re: Lenovo ThinkPad W510 Bricked after BIOS upgrade
I will try.
Thank you peste!Leave a comment:
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Lenovo ThinkPad W510 Bricked after BIOS upgrade
Hello
I think I bricked the BIOS in Lenovo ThinkPad W510.
I tried to update BIOS with bootable CD with official Lenovo flash tool and when I try to boot, Caps Lock flashes once and the screen stays black.
How I tried to fix it:
I followed instructions on how to extract .bin file (InnoExtractor) from official BIOS update but unfortunately BIOS for this model consists of .FL1 and .FL2 files.
I am attaching dump of my chip, made after failed update – I unsoldered...Leave a comment:
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Re: New Members - please post your introductions here
Hello!
I am a tech enthusiast and like to fix things.
I stumbled upon this forum, and it is full of invaluable information and helpful community.Leave a comment:
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