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 Post subject: ID'ing laptop display model without disassembly
 Post Posted: Fri Aug 19, 2011 5:24 pm 
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Joined: Thu Jun 07, 2007 10:54 am
Posts: 196
Location: Minneapolis, MN
How can you ID the display model used in a laptop without disassembling the display? For instance, I can tell that mine is either an N141C3-L05, LP141WP1-TLB8, or LTN141WD-L05 from http://www.thinkwiki.org/wiki/TFT_display, but other than that I'm stuck. Thanks.


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Fri Aug 19, 2011 5:37 pm 
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Joined: Sun Feb 04, 2007 11:44 am
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If all of those have the same specs. (e.g. size and resolution), then I believe the PNP Hardware IDs would all be the same. In that case unfortunately I don't think there is any other way. Scott.


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Fri Aug 19, 2011 5:46 pm 
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Joined: Thu Jan 15, 2009 1:27 pm
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Location: Stowmarket, Suffolk England
This causes me problems too, I get screen from a good local company, but they need the actual panel code, not just the laptop as some of the connectors (and assume other nuances) are different.

Also makes Laptop screen quality reviews meaningless!


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Sat Aug 20, 2011 4:53 pm 
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Location: Minneapolis, MN
I was able to do it using Parts Lookup (Support > Product & Service Warranty > Check Warranty Status > Parts Lookup) and Thinkwiki (http://www.thinkwiki.org/wiki/TFT_display). Parts Lookup gives lists a FLT PNL DS FRU 14.1 WXGA+, Mfg P/N 42T0452, FRU P/N 42T0453. 42T0453 on ThinkWiki lists it as a CMO N141C3-L05.

Curiously, I can only find datasheets on N141I3-L01 and N141I3-L05, and those panels are both 1280x800, not 1440x900 as in the TP. Website listings for the N141I3-L03 also show 1280x800. How can this discrepancy be explained?

Also, it seems capable of displaying only 262,144 colors, based on the L01 and L05 datasheets, and the website listings for the L03. Is that normal? I would have thought 16.7 million colors.


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Sat Aug 20, 2011 7:08 pm 
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How can this discrepancy be explained?

Lenovo uses multiple suppliers for the same component. I doubt you can tell which one you have without checking it visually.

Quote:
Also, it seems capable of displaying only 262,144 colors... Is that normal? I would have thought 16.7 million colors.

That is indeed normal. Typically only very high end LCDs can display 16.7M colors. Scott.


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Sat Aug 20, 2011 7:13 pm 
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Location: Minneapolis, MN
They use different components, would each has its own MFG P/N and FRU, right?


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Sat Aug 20, 2011 7:30 pm 
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From what I've seen with Lenovo, yes. For example, while a given system may be assembled with displays from several different suppliers, each would generally have a unique FRU or part number. While you don't get to choose which one you get in the systems you purchase, when purchasing replacement parts you can choose the specific one you want.

For example, in the past I remember checking several of the same model ThinkPad and noticing slight differences in the feel of the keyboards. Upon dissassembly I found that I preferred the feel of one specific supplier's keyboard over the other, so when it came time to order a replacment I chose that specific one even though technically both were the "same" in Lenovo's eyes, and both were identical as far as mounting and connecting. Scott.


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 Post subject: Re: ID'ing laptop display model without disassembly
 Post Posted: Sat Aug 20, 2011 7:35 pm 
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Joined: Thu Jun 07, 2007 10:54 am
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Then the resolution of the specific MFG P/N and FRU P/N seems to not match the world outside of Lenovo.


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