New to home repairs

[DumbPCuser]

It all depends on

1. Is the supplier reputable and puts that info on.
2. Is the screen brand new (yours is not) or has the sticker fallen off as the glue is weakened by the heat.
3. Is the new screen any good - even a brand new screen can be DOA

Even if the parts look the same it does not mean the same.
Something as simple as a cable can look the same but unless you know the part number is exactly the same.
No revision numbers then the cable can be terminated differently, you then have to bell out the connectors.

Many Many parts look the same it is only when you start to read the id names/numbers that you can be sure they are the same.

Yes

You either need experience - not you (Please do not take this comment the wrong way we all had to learn)
OR
a service manual to show what outputs you should be getting from each component.

Exhibit ‘i)’ images attached will be the cracked original screen that i needed to replace; and exhibit ‘ii)’ is the replacement purchased from ebay. I know it may be time consuming, but if you can understand those numbers i’d really appreciate a dumb-dumb break down of what they mean. If you can, i realise that may be time consuming and tedious. ( i hope the file types work for you, i had to resize, im still lurning. If not im happy to resupply)

1. The supplier did not include the info you showed in the screenshot you provided above. I did find similar specifications as to what you provided, but as an inexperienced ‘technician’ i just assumed C700=C700, it appears this is not the case.
2. The replacement screen was labelled as ‘pulled from working computer; no faults’ I am highly dubious at this item description. Then again, maybe it was all my fault putting on parts that shouldnt go.
3. I am not 100% certain, is there some kind of test i can do to be certain? I only have the c700 laptop to test this so unless there is another method, i dont believe i could test it. But please, if there is another method, i would appreciate to hear it.

I assume there is enough discrepancy between those numbers to be incorrect and ‘terminate differently’ compounding further problem. If it is not too much trouble, could you briefly explain this ‘bell out’ of the connectors?
I would greatly appreciate your experienced input on the numbers i have provided.

YES, no offense taken, i definitely need experience, but i think i covered that a couple of times in the original post.
And i would very much appreciate to know more about these service manuals, is there a website with, like, a library of service manuals?

Thankyou so much again for your input and participation here sir, greatly, greatly appreciated.

[DumbPCuser]

When you say you got a ‘new’ screen, do you mean the LCD panel that goes into the hinged screen top of a laptop, or the whole hinged part itself - complete with all the LCD stuff inside the outer casing?

But to answer your questions…
a) 100% it’s a great way to learn, only surpassed by someone teaching you first
b) if you are replacing the LCD panel and backlight components that then go into the outer shell casing then yes, many things can go pear shaped
c) laptop manufactures change their models very regularly, so while getting the same screen for your model should be a good indicator, it is no guarantee. For example, were they the same motherboards?
d) as to utilising bad parts, it all depends on what the damage was. If there was a shorted circuit, or a faulty power flow issue, then that would have effected the target component as well

Hi Bruce, The whole hinged part complete with the LCD and components inside the case and the case as well.
a) That is why i am here pestering the masters (you)
b) to begin with, this was not my plan, but upon finding a whole ‘screen assembly’ i figured the lazy way out would be to switch that whole piece over. It was only after i failed that, that i started switching up LCD screens and backlight adapter bars.
c) This is a very relevant question to which i have no idea, and i am not sure i could easily get an answer to that, as i have no idea where the screen originally came from/off, except for the fact that it had the ‘C700’ logo imprinted in the case exactly like the one i already did. I assume by your question that this is a very important factor to screen replacement? Or just replacing parts in general? yes?
d) I am thinkng that this may be my issue, i could be wrong and maybe it was my inexperience and purchase that was the issue. I presume i may be able to provide a more precise retort to this in the future after you blokes answer a couple more of mine and fill in some more blanks. ( as if i did make bad purchase, then it was my fault, and likely not a faulty component… i presume)

Thankyou very much for your input and participation Bruce, i greatly appreciate it.
I feel like i am getting some solid answers, even if they obviate my ineptitude and inexperience.

[DumbPCuser]

Thankyou everyone for your participations. I feel like i am on the precipice of some valuable learnings here, which may be very useful in the future, as i wish to work my way up to tinkering on an old gaming pc i have, that i power surged, but it still sort of works, but id like to refurb to make it actually work how it should/used to pre power surge.

[Bruce]

It sounds like the ‘new’ screen may have come from a potentially flaky source, or may not have been in 100% working order, or may not have been exactly the right model, or lets be honest, may have not been handled/installed ‘just right’ by yourself - or more than one of those options!

My thoughts are that if someone is selling computer gear, it’s because of two reasons - it’s faulty somewhere and needs attention, or it no longer suits their needs. I feel this guy you got the screen from may be the first reason.

To a certain degree, it doesn’t matter all that much how we got here, you now need to decide if you go down this path again but this time better prepared, or give up on the laptop, or call in the big guns.

I had a laptop screen replaced under warranty about 10 years ago, and as I was picking up the fixed unit I casually asked the guy, if I were to have had to pay for this myself, what would I be up for. He showed me the invoice he prepaid for the insurance company and it was $180 for labour and $180 for the new LCD panel and backlight. So that’s probably a rough guide of what you’d be up for if getting a repair shop involved.

As to your specific questions - c) in general yes, replacing parts is pretty specific, like HDD controller boards, or capacitors, and yes screens. But in other areas you have a bit of leeway, like power supplys, LEDs, potentiometers. No hard and fast rule.

[PeterOz]

Then again, maybe it was all my fault putting on parts that shouldnt go.

Most Likely
but if you can understand those numbers

The numbers only mean something to the screen people. You would need to know the code system they use.
Every company. HP, Dell etc will all have a different code system.
So a number That E.G at Dell means 40 pin cable at HP could mean Matt panel.
Without the code list you will never know.
If numbers are different then you need the exact specs to see if it was updated but is still backward compatible.
Normally that is the revision number.
Just looking at one item - The LCD cable the numbers do not match.
I would then assume they are different parts.

bell out’ of the connectors

The easy method is to have a multimeter that can beep - Continuity.
You place one probe on one pin of the cable and the other probe on the other end of the cable.
When it beeps you know what is connected at each end.
A straight cable will beep on Pin 1 and Pin 1, Pin 2 and Pin 2 etc etc.
A cross over or special make cable could beep on Pin 1 & Pin 8.

And i would very much appreciate to know more about these service manuals, is there a website with, like, a library of service manuals?

Yes. it is called Google and a bit of luck.
Companies are loath to giving out information = Trade secrets.

The replacement screen was labelled as ‘pulled from working computer; no faults’

Could well have been BUT you may have connected it to an incompatible machine and the you started down the rabbit hole by replacing parts.

I am not 100% certain, is there some kind of test i can do to be certain?

Not without a service manual.
Also with swapping parts you do not know if you have blown anything.

and it was $180 for labour and $180 for the new LCD panel and backlight

DIRT CHEAP.
I had a client with broken screen - maybe 12year ago.
Hp said new screen could only be fitted by them. - No choice back then. $900.00
Client bought a new laptop less then $700.00.

if getting a repair shop involved.

Or remove screen altogether and attach a monitor.

[PeterOz]

And just to show more detail it can get down to the CPU you have.
These are all for the same HP Model but as you can see it depends on the cpu as to which cable to use.
[ATTACH type=“full”]13568[/ATTACH]

[Bruce]

@DumbPCuser - any news?

[Bruce]

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