Hi projekan,
I don't think there's any update. I also can't say whether your laptop has the same problem as mine without taking the measurements and following some of the beginning steps in the sticky threads.
max_smart
New Member
Last Activity: 10-10-2024, 12:08 PM
Joined: 08-26-2021
Location: Durham, NC
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Hi [USER="544936"]JMCat[/USER], sure, no problem. This forum is great-- but I did read ALL the information before daring to cut any permanently-bonded-to-lcd cables.
Ok, I probed EN1 and EN2 while turning on the machine. They both start at 3V for about a second or less, then turned off (0V). I also probed L3 and L4 while turning on the machine, and those rails never came up from 0V.JMCatLeave a comment:
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Hi mon2, thank you for replying. Both the 5V and 3.3V measure at 0V when power is applied. EN1 and EN2 both trace back to a single M1_ON coming from the ThinkEngine chip. I will test EN1 and EN2 when I get to work next. I did write down those resistances (ohms):
L3 0L
L4 265
L5 0L
L1 6.4
L2 4.2
L7 180
L35 22
L6 275
also found this: [URL]https://logi.wiki/index.php/Resistance_to_Ground_List#Ivy_Bridge[/URL]https://Hi mon2, thank you for reply... trace back toLeave a comment:
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T430 laptop doesn't power on- please help me troubleshoot w/multimeter (fixing for fun)
Hi all,
First off, this forum really helped me out by advising me to cut some ribbon connectors to the LCD panel in order to fix a 70" TV (lots of threads on Sharp TVs with this issue). I didn't believe that it could work, but it did.
Now I've been encouraged to try to diagnose something quite a bit more complicated. That is an old T430 motherboard. I work on a college campus so I have access to pretty decent tools. I found the schematic for the motherboard on the site, and have been following traces and taking DC measurements from things. I also don't mind... -
Hi all,
This is such a great forum-- thanks to all the people commenting here and sharing their knowledge. I came here last week to get help figuring out what was wrong with a free 70" sharp TV that I had come into possession of. There was a thread that precisely told me how to diagnose and fix the problem. It involved cutting the ribbon cables that were permanently bonded to one side of the screen (!). Worked like a charm. I'm currently trying to diagnose a Lenovo mobo.Leave a comment:
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