Author Topic: Repairing Crossover 30Q5 PRO 30" monitor  (Read 7225 times)

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Offline Specmaster

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #50 on: March 31, 2018, 12:19:07 pm »
Hmm you might well be right, I just don't know because information about this monitor is unobtainable and it only has 4 boards with in it, the Invertor board, the T-Conn, the button board and the 4 port LVDS board and the only board that I have been able to locate is the T-Conn. The Invertor is working as I see the lighting taking effect and can control the level of it and therefore the button board must be working for that to happen so that only leaves the 4 port LVDS one, so is the scaler board part of that board? In your opinion, could that board be the reason why I'm not getting any video displayed and not the T-Conn as previously was thought to be the faulty item?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #51 on: March 31, 2018, 12:28:49 pm »
Probably it's just an interface converter board and not scaler and this display don't have OSD. Someone had tin whiskers on it http://nand-hate.com/2015/11/crossover-30q5-pro-black-30-2560-x-1600-korean-ips-monitor-repair-notes/
So you might try cleaning QFP IC pins with a brush with alcohol.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #52 on: March 31, 2018, 12:35:19 pm »
Is monitor detected by PC? As it does not seem to have scaler, it should support only 2560x1600 and, likely, 1280x800 resolutions. 2560x1600 resolution needs Dual link DVI cable. Also integrated graphis card on the motherboards do not have dual link DVI AFAIK. If this monitor receives wrong signal, it won't show anything as it does not have it's own OSD/menu.
« Last Edit: March 31, 2018, 12:37:02 pm by wraper »
 

Offline Specmaster

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #53 on: March 31, 2018, 12:36:39 pm »
I have been using that thread as my guide through this process and I too thought I saw tin whiskers re-flowed the connections and they disappeared. I also replaced every electrolytic cap on the LVDS board.
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #54 on: March 31, 2018, 12:39:03 pm »
I have been using that thread as my guide through this process and I too thought I saw tin whiskers re-flowed the connections and they disappeared. I also replaced every electrolytic cap on the LVDS board.
As I understood you reflowed T-CON board, not this one :palm:. And QFP IC shuold not be reflowed, but soldered with soldering iron.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #55 on: March 31, 2018, 12:46:57 pm »
As monitor reacted on your manipulations on interface converter board, LCD panel and T-CON likely were fine to begin with.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #56 on: March 31, 2018, 01:06:39 pm »
Current DVI cable is single but the graphics does support Dual DVI leads and is capable of resolutions upto 5120 x 3200, so are saying that in essence, without a dual link DVI cable between the two then, I won't get any form of display on the screen?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #57 on: March 31, 2018, 01:48:13 pm »
Current DVI cable is single but the graphics does support Dual DVI leads and is capable of resolutions upto 5120 x 3200, so are saying that in essence, without a dual link DVI cable between the two then, I won't get any form of display on the screen?
What are available resolutions? IME with single link DVI, 1280x800 should be only resolution available.
 

Offline Specmaster

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #58 on: March 31, 2018, 02:35:36 pm »
Current DVI cable is single but the graphics does support Dual DVI leads and is capable of resolutions upto 5120 x 3200, so are saying that in essence, without a dual link DVI cable between the two then, I won't get any form of display on the screen?
What are available resolutions? IME with single link DVI, 1280x800 should be only resolution available.
Well at present it is connected to a LG Flatron W2261VP monitor and the available settings on the graphics card for this monitor are as follows:-
800 x600
1024 x 768
1152 x 864
1280 x 720
1280 x 768
1280 x 800
1280 x 960
1280 x 1024
1360 x 768
1366 x 768
1600 x 900
1600 x 1024
1680 x1050
1920 x 1080 which what I have set it at for the best quality image on screen.
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #59 on: March 31, 2018, 03:04:43 pm »
Well at present it is connected to a LG Flatron W2261VP monitor and the available settings on the graphics card for this monitor are as follows:-
Why would it matter which supported resolutions are shown with other monitor?
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #60 on: March 31, 2018, 03:10:05 pm »
Well, they are the only things I can offer you as I have yet to get the Crossover working so I can see an image on it. I have zero information on it other then than whats contained in the other link about another one that was nursed back to life again, the same link you found?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #61 on: March 31, 2018, 03:32:44 pm »
Connect it to PC and check what supported resolutions are displayed for it. It does not need to be fully operational for that.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #62 on: March 31, 2018, 03:40:17 pm »
OK, I'll do that shortly, right now I'm about midway through copying one drive over to another and don't wont to interrupt the process.
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Offline Specmaster

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #63 on: March 31, 2018, 05:38:59 pm »
Connect it to PC and check what supported resolutions are displayed for it. It does not need to be fully operational for that.
Just been thinking about this, how am I going to be able to see what these supported resolutions are if I can't get any display on the screen then? Is this an April fools joke?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #64 on: March 31, 2018, 06:10:55 pm »
Connect it to PC and check what supported resolutions are displayed for it. It does not need to be fully operational for that.
Just been thinking about this, how am I going to be able to see what these supported resolutions are if I can't get any display on the screen then? Is this an April fools joke?
|O, it's not April here yet. Do you realize that PC usually can see even dead monitor if EEPROM containing E-EDID is still alive. And what are you going to check on the monitor without screen menu?
I remind you again, this monitor will just show black screen if input signal is not supported. So it's useful to check if at least monitor is detected by PC and signal with right resolution is outputted.
« Last Edit: March 31, 2018, 06:14:03 pm by wraper »
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #65 on: March 31, 2018, 07:00:07 pm »
Connect it to PC and check what supported resolutions are displayed for it. It does not need to be fully operational for that.
Just been thinking about this, how am I going to be able to see what these supported resolutions are if I can't get any display on the screen then? Is this an April fools joke?
|O, it's not April here yet. Do you realize that PC usually can see even dead monitor if EEPROM containing E-EDID is still alive. And what are you going to check on the monitor without screen menu?
I remind you again, this monitor will just show black screen if input signal is not supported. So it's useful to check if at least monitor is detected by PC and signal with right resolution is outputted.
No, its not April here yet either, but we do it seems all getting different time stamps, 3 of us in the UK are reporting times so we have a bug in the system  :-DD

Yes I understand that the backlight is dependant on the video signal and I have already stated in post #43 "In the case of the Crossover monitor, if I switch it on without a video signal being present, then after a couple of seconds, it switches off again. Give it a video signal and switch it on, it will remain on as long as the video signal is present." So that means the PC  can clearly see the monitor is attached and the backlight is on all the time it is connected. If I disconnected the video lead and then switch on the monitor. it will within 2 seconds switch off completely.  As soon as I reattach the LG monitor then when I check on the resolutions it is going to give the resolutions that the LG is capable of displaying unless I'm missing something here?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #66 on: March 31, 2018, 07:04:46 pm »
Monitor may turn on backlight even with incompatible signal.
Quote
As soon as I reattach the LG monitor then when I check on the resolutions it is going to give the resolutions that the LG is capable of displaying unless I'm missing something here?
Yes.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #67 on: March 31, 2018, 07:07:22 pm »
Monitor may turn on backlight even with incompatible signal.
Quote
As soon as I reattach the LG monitor then when I check on the resolutions it is going to give the resolutions that the LG is capable of displaying unless I'm missing something here?
Yes.
So maybe its worth me ordering up a dual link DVI cable and trying it again then?
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #68 on: March 31, 2018, 08:40:19 pm »
Duallink DVI lead ordered to test the theory out and should hopefully be with me by the end of the week.  :-//
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #69 on: March 31, 2018, 09:10:58 pm »
Monitors without scaler I've seen before still worked at half resolution (1 pixel is displayed as 4 physical) with single link cable. You could google if this model works at 1280x800. I still suggest checking which resolutions are reported as supported.
« Last Edit: March 31, 2018, 09:13:17 pm by wraper »
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #70 on: March 31, 2018, 10:46:26 pm »
Done some more research on Google (seems to more on there now than there was before) and it seems that this particular monitor must be used with the DVD-D leads as it is not compatible with the DVI-I system at all. So it would seem that I have struggling to get it working when it should not have been doing so with the particular leads that I have.

Thank you for pointing me in the right direction, as mentioned before, DVD-D lead is ordered and I hope will with my by Friday so I can test it again using that lead, watch this space for further updates.

EDIT update with link http://2560x1600monitorek4.blogspot.co.uk/2013/04/crossover-30q5-pro-black-30-30-inch.html.

Another site states that this will only work at 2560 x 1600 so will therefore not be able to display the normal boot up screens, so the screen will be blank until the PC is up and running and the full resolution comes into effect. I may have to configure the pc to use 2 monitors, the smaller on for boot up displays in case of any errors occurring otherwise it seem that the Crossover monitor has failed  :palm:
« Last Edit: March 31, 2018, 11:09:17 pm by Specmaster »
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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #71 on: March 31, 2018, 11:55:53 pm »
DVI-I is the same as DVI-D but has a few additional pins to output VGA over DVI connector.
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #72 on: April 01, 2018, 12:06:13 am »
It still may display bios/boot screen if GPU can upscale by itself therefore doing the task instead of monitor. It certainly worked with Geforce 8800GT, HD4870x2 and HD6950 I had in the past. Although that 30" monitor without scaler I had supported both 2560x1600 and 1280x800 (bios outputs 640x480).
 

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #73 on: April 01, 2018, 12:06:59 am »
It seems the page that the last link I posted has been taken down now, strange because it was there a few minutes earlier.

https://joannehears.wordpress.com/2013/06/28/cheap-deals-crossover-30q5-pro-black-30-monitor-lcd-for-sale/
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Offline Specmaster

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Re: Repairing Crossover 30Q5 PRO 30" monitor
« Reply #74 on: April 01, 2018, 12:11:40 am »
It still may display bios/boot screen if GPU can upscale by itself therefore doing the task instead of monitor. It certainly worked with Geforce 8800GT, HD4870x2 and HD6950 I had in the past. Although that 30" monitor without scaler I had supported both 2560x1600 and 1280x800 (bios outputs 640x480).
Well, we will find out if it works soon enough  :-+
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