Replaced HD, now screen won't work

Bodhi395

macrumors 6502a
Original poster
Jul 23, 2008
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So, I decided to replace the 500GB hard drive on my 21.5 inch iMac (2010 model), and upgrade to a 2TB. I bought the hard drive, got the guide from ifixit.com to install it myself and went to work. I popped it open, followed the directions exactly, and everything went fine. Then once I replaced the hard drive and closed up the iMac, once I turned it back on the screen was black. It started up, made the start up chime, sounded like it was working fine, but the screen just won't come on. I've gone back and made sure all 4 wires that attach to the screen are connected, and played around multiple times plugging them in and making sure they are all correct. But every single time I turn it back on the screen won't work! It's frustrating. Does anyone have any idea what's wrong here and how I can fix it?
 

RoyalFlushAK(s)

macrumors member
Jun 15, 2011
68
0
By mistake you may have cause something to short inside and burned the CPU. I suspect you have to get another machine because Apple will not fixit for free. It has happen with me last year

A♠K♠Q♠J♠10♠
 

Paulywauly

macrumors 6502a
Sep 26, 2009
766
0
Durham, UK
If you've definatly checked all the attached cables its possibly static damage. Wont be covered over warrenty or Applecare so you'll have to pay for repairs
 

rj86

macrumors member
Jun 9, 2011
49
0
First of all: is your machine in warranty? If so, it's worth putting the original HD back in and seeing about taking it in for repair.

It's worth checking the connection on both sides of the LVDS cable, both going into the board but also the display itself.
 

Bodhi395

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Jul 23, 2008
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Paulywauly said:
If you've definatly checked all the attached cables its possibly static damage. Wont be covered over warrenty or Applecare so you'll have to pay for repairs
What's 'static damage'?

It is under warranty. If I put back original HD and take it to Apple store, will they be able to tell I had opened it up?
 

Paulywauly

macrumors 6502a
Sep 26, 2009
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Durham, UK
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What's 'static damage'?

It is under warranty. If I put back original HD and take it to Apple store, will they be able to tell I had opened it up?
You could try it, although you would be misleading Apple into thinking they would be responsible for this when they quite obviously are not. However thats for you to decide in the end.

Static damage is damage caused to electronic components due to static charge from your body. This can happen when you handle pc components without any form of static protection (such as grounding yourself with a static wrist strap etc)

If you havent realised that and opened it up without protection its perfectly plausable you've damaged a component
 

velocityg4

macrumors 601
Dec 19, 2004
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What's 'static damage'?

It is under warranty. If I put back original HD and take it to Apple store, will they be able to tell I had opened it up?
If you tore anything or left tool marks they may be able to tell. Otherwise I doubt it.

Reseat all the cable on both ends. Just to make sure the video signal cable and power cables are properly attached. If the screen is lighting up with no picture then it is likely something to do with the video cable. If it is not lighting up at all then it is likely something to due with the cables from the power inverter to LCD or PSU to inverter.
 

Bodhi395

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Original poster
Jul 23, 2008
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velocityg4 said:
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What's 'static damage'?

It is under warranty. If I put back original HD and take it to Apple store, will they be able to tell I had opened it up?
If you tore anything or left tool marks they may be able to tell. Otherwise I doubt it.

Reseat all the cable on both ends. Just to make sure the video signal cable and power cables are properly attached. If the screen is lighting up with no picture then it is likely something to do with the video cable. If it is not lighting up at all then it is likely something to due with the cables from the power inverter to LCD or PSU to inverter.
It's not lighting up at all, completely black.
 

velocityg4

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Dec 19, 2004
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It's not lighting up at all, completely black.
Then I would look at the LCD power cables. They are usually pink and white or blue and white. Then for the inverter check to make sure it's power source from your PSU to Inverter is plugged in.

Unfortunately without the correct tools you can not test for power from the inverter to the LCD. As most electrical testers can not handle the high voltage. Though if you have a tester you can check between the PSU and inverter.

Or you can put in your old hard drive. Carefully reassemble and take your chances with Apple.

Edit: If there are multiple power jacks between the inverter and LCD. Then I would look at the cable between the PSU and inverter. As it is unlikely that more than one lamp in the LCD failed simultaneously. If the cable from the PSU to inverter registers power. Then the most likely problem is a failed inverter.
 

Bodhi395

macrumors 6502a
Original poster
Jul 23, 2008
817
0
Then I would look at the LCD power cables. They are usually pink and white or blue and white. Then for the inverter check to make sure it's power source from your PSU to Inverter is plugged in.

Unfortunately without the correct tools you can not test for power from the inverter to the LCD. As most electrical testers can not handle the high voltage. Though if you have a tester you can check between the PSU and inverter.

Or you can put in your old hard drive. Carefully reassemble and take your chances with Apple.

Edit: If there are multiple power jacks between the inverter and LCD. Then I would look at the cable between the PSU and inverter. As it is unlikely that more than one lamp in the LCD failed simultaneously. If the cable from the PSU to inverter registers power. Then the most likely problem is a failed inverter.
I double checked every wire and jack connected to the LCD and still can't find anything wrong that is visible and the screen still won't come on. I guess something just shorted out.

I think I will try to take it to the Apple store. I might just leave the new HD in and tell them what happened, even if ill have to pay then. I think the alternative is worse because even if I put the old HD back in and managed to get it fixed without paying, I still want my new HD installed. So I'd have to open it up again, which I don't really want to do anymore.

Thanks for all your help!
 

RoyalFlushAK(s)

macrumors member
Jun 15, 2011
68
0
You need to get a new machine. Don't even try to fool Apple because it will be embarrassing and they will figure out in two seconds. Why make Apple pay for your mistake? Go out and get yourself another new machine or if you cannot lay that price, get a used PC running under Windows for $300 or less from eBay or Craiglist.

RF,
 

MattSepeta

macrumors 65816
Jul 9, 2009
1,255
0
375th St. Y
Yep

I would see if your video-out still works. If so, your screen is toast probably.

This is why I wore stupid static-proof gloves when I added my SSD. Sure, it was almost impossible working with them, but it drastically lowered the risk of damaging any components.
 

Mr Rogers

macrumors regular
Oct 24, 2003
225
3
Hong Kong
I'd rather pay Authorised Apple store to do this type of upgrade, only costs US$25.oo with CASE in Hong Kong, also warranty still valid - if they screw up they have to fix it.

As for static, I'm not afraid of looking inside my iMacs, but after this notice, will grab a static device to remove static danger from my person - I used to work in IT and actually build Motorola-based CPU devices from scratch, never had any issues with static myself and never used protection - but that was more than 25 years ago, things have changed and IT equipment is now far more sensitive.

If I were you, as many have stated, replace with your old HDD making sure it looks near as untouched as possible - make sure any fingerprints and grease marks are removed and take it in for repair acting 'dumb'.

Others may complain, but if Apple put decent sized drives in to begin with and actually charged a fair price for a spec jump this would not happen - as it stands, it now as cheap to put a 3T HDD into a iMac after purchase, rather than pay s stupid price for a small increase in HDD space, particularly given Apple probably gets its 2T drives OEM for less than US$70.00.
 

JonyHolt

macrumors newbie
Jul 13, 2011
21
16
Fresno, CA
Just a quick check. Did you make sure your memory was completely seated back into your iMac? If the Memory was not placed in all the way the machine will not power the screen on.
 

Mr Rogers

macrumors regular
Oct 24, 2003
225
3
Hong Kong
I should have added in my last post, if I were you, I'd disconnect all connectors one by one taking good note and re-assemble slowly, whilst a connector may look as if its in place, sometimes this is not the case - you may be surprised at end result - I certainly hope so.
 

R.OG

Suspended
Aug 19, 2010
172
0
Try reseting your PRAM, i once ran my imac without the internal lcd attached and when i plugged the lcd back the display would not come on until i reset the PRAM.
 

Bodhi395

macrumors 6502a
Original poster
Jul 23, 2008
817
0
Try reseting your PRAM, i once ran my imac without the internal lcd attached and when i plugged the lcd back the display would not come on until i reset the PRAM.
I thought simply unplugging the iMac for a minute automatically resets the PRAM. Or is there another way to do it?
 

Bodhi395

macrumors 6502a
Original poster
Jul 23, 2008
817
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So, took iMac into Apple store and was truthful and told them I had replaced the hard drive when the screen stopped working. They took it in and called a week later and said the issue was with the cables to the display had been damaged and they replaced display, logic board, and back panel. Not sure why they couldn't just replace the cables.

Anyway, they said it was covered under my warranty, but that it was a 'one time exception' because I had been cause of damage. I wonder if its normal for them to grant exceptions like this, anyone else have this experience?

So, I'm happy I didn't have to pay and being honest didn't come back to bite me.
 

product26

macrumors 6502a
May 30, 2005
774
10
it was probably the display plug on the logic board. The display cable clips in with very very little pressure.
 

Paulywauly

macrumors 6502a
Sep 26, 2009
766
0
Durham, UK
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So, took iMac into Apple store and was truthful and told them I had replaced the hard drive when the screen stopped working. They took it in and called a week later and said the issue was with the cables to the display had been damaged and they replaced display, logic board, and back panel. Not sure why they couldn't just replace the cables.

Anyway, they said it was covered under my warranty, but that it was a 'one time exception' because I had been cause of damage. I wonder if its normal for them to grant exceptions like this, anyone else have this experience?

So, I'm happy I didn't have to pay and being honest didn't come back to bite me.
thats really good of them letting you off with it.

There defiantly do make exceptions on occasion. When my girlfriends MBP battery died a few month back it turns out a power surge had wiped out the magsafe & battery circuitry, they were not responsible for it at but didn't charge for it
 
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