Re: HP Probook 6550b not turning on - Blinking light
I really don't know man, I'm not an expert, I'm usually after help for this stuff myself. Good luck with it....
kimlo
Member
Last Activity: 04-01-2022, 12:34 AM
Joined: 05-24-2017
Location: Queensland
-
Re: HP Probook 6550b not turning on - Blinking light
[url]https://mega.nz/#!xAZ3QCyI!IwetnNg_jFo9Odho7hBlm-D1y4HJVXWoBZF72y03aQA[/url] I have made a new link with schematic. I don't know if it's the right one but that's the one I had.Re: HP Probook 6550b not turning on ...the one I had.Re: HP Probook 6550b not turning on - Blinking light
...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
I have 2 different chargers that I've been testing the laptop with.
I just tested that middle pin, and I'm getting 1.7v, and 19.2v on pin 3...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
Hi, what is the central pin?
[ATTACH]157568[/ATTACH]
I get 19.2v on both pin 1 and 2, the pin in the middle gets .4v, I believe that's a "data" pin, is that what you mean?Re: HP Probook 6550b not turning on - Blinking light
Hi, what is the central pin?
[ATTACH]157568[/ATTACH]
I get 19.2v on both pin 1 and 2, the pin in the middle gets .4v, I believe that's a "data" pin, is that what you mean?...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
[ATTACH]157567[/ATTACH]
I've checked the U2 chip it all looks good to me. Only thing that I'm not sure of is PGOOD, should there be votlage on PGOOD? OR does that voltage only present if the computer is turned on.Re: HP Probook 6550b not turning on - Blinking light
[ATTACH]157567[/ATTACH]
I've checked the U2 chip it all looks good to me. Only thing that I'm not sure of is PGOOD, should there be votlage on PGOOD? OR does that voltage only present if the computer is turned...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
Thanks man, I really appreciate your tip
I'm not back at work for a couple of days but I will check this first thing Monday and get back to you!...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
Sorry if I'm a noob, but the coils are just the inductors yeah? The L1, L2, etc? [ATTACH]157413[/ATTACH] like in this picture?
I've measured every coil I can see, none of them have any voltage except the very first L1 coil (which is a very small one, right next to DC jack) that gets 19.2v, every other coil I have checked has zero voltage on both sides.Re: HP Probook 6550b not turning on - Blinking light
Sorry if I'm a noob, but the coils are just the inductors yeah? The L1, L2, etc? [ATTACH]157413[/ATTACH]...Leave a comment:
-
Re: HP Probook 6550b not turning on - Blinking light
So from my limited understanding, I'm kind of stuck on where to go next with this one.
SMSC_KBC1098_VTQFP_128P - There is this chip which I believe plays a big part in getting the computer to turn on if the 3v/5v/19v lines are present, but I could be wrong. I was going to test this chip[ATTACH]157397[/ATTACH]
but the pin numbers are all over the sop, and I'm not too sure how to find what pin. Is it literally in order shown in the schematic? 103,104,5,74, etc? I thought pins always followed chronologically....Leave a comment:
-
HP Probook 6550b not turning on - Blinking light
[B]Description of problem[/B]
Won't turn on or post, no fan spin
When I plug in the DC jack, the power light comes on for half a sec then goes off.
If I try to turn on by DC power, the orange power light (lightning icon, not power button) blinks 8 times
If I try to turn on by battery power, the same light actually goes solid blue for 2-3 seconds, then flashes at least 8-10 times, then the light goes off, still doesn't turn on.
[B]Schematic of laptop[/B]
[url]https://mega.nz/#!QZQAwRxD!_J2GCZ2Fo0QWOGRKXq9hLcrR3YAZYLJ-U4Ce5R-eonE[/url] - HP Probook... -
Re: New Members - please post your introductions here
Hello all,
I'm a computer/mobile tech from Australia. Hoping to learn a lot from these forums and offer my own knowledge where and when I can
Looks like an awesome community.
Leave a comment:
No activity results to display
Leave a comment: