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  Display problem with Toshiba Satellite Pro 4600 
 
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Kevin Baillie Oct 11, 2003, 10:25am EDT Reply - Quote - Report Abuse
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I have a Satellite Pro 4600 and the screen fades almost to black, like it is in the hibernate mode - you can barely read what is on the screen. When you tap the pin that sticks up above the keyboard on the right side (that pushes down when you close the lid) the screen will usually come back to full brightness - usually for a second or two - sometimes for a couple of hours.

When hooked to an external monitor, the display on the ext. monitor is fine, the display on the laptop still goes very dark.

I changed the software settings to "never" for the hibernate mode, for all occasions, including when the lid is closed, thinking the pin above the keyboard was the problem, but that didn't change anything.

Has anyone else had this problem. or does anyone have any idea of what is broken or defective. I see another 4600 with the same problem going cheap on e-Bay, so it may be a common problem.

Thanks.


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Punita Juneja Nov 09, 2003, 10:48pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have a Toshiba Satellite 1735 with the exact same problem. Did you ever find a solution?

Antonio Reher Nov 18, 2003, 07:31pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Same problem here with a 1800. Only had the damn thing for a year and a half! seems to me like it's a hardware problem, but then it works again for a while... The backlight lamp won't go on, but the tft is displaying correctly... any ideas?

Paul Smith Nov 21, 2003, 06:09am EST Reply - Quote - Report Abuse
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Edited: Nov 21, 2003, 06:10am EST

 
>> Re: Display problem with Toshiba Satellite Pro 4600
I also get this issue on my 4600. Have tried switching batteries since the old battery was dieing anyway, but it definately NOT a battery / power issue. Interesting thing is though that when the power cable is out, the screen last just a little longer before fading out most of the time.

Any suggestions greatly appreciated.

Frank g Dec 09, 2003, 12:11pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have the exact same problem on the 4600 as well. Anybody find out why?

Rory Witham Dec 09, 2003, 12:21pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Look guys, its got to be poor workmanship, if you poke, kick, hit or drop it and it works, there must be a bad conection.

under trading rules etc, a device thats faulty when its sent out or doesnt work as to its discription should be refunded or replaced by the seller or manurfacture. (may just be uk)


Custom Computers: http://www.gtwcmt.co.uk/GT%20PERFORMANCE%20COMPUTERS/index.html
Computer maintenance: http://www.gtwcmt.co.uk/Computer_maintenance/index.html
Computer repairs: http://www.gtwcmt.co.uk/Computer-repairs/index.html
Scuz Hakatak Dec 10, 2003, 03:41pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have a Toshiba Satelllite S177 with the same problem. Here are the results of my investigation.

If your screen is going dark, but you can still barely see the picture in the background, you have a bad invertor. The invertor i believe is responsible for the light going on and off. obviously it's a hardware problem.

I bought my laptop from Best Buy (US) and had the problem turn up thrice. all three times Best Buy sent the laptop to toshiba. Toshiba would replace the invertor and my laptop would be fine for a few months.

on the 4th repair, Best Buy conveniently said it's a software problem. did some thing to make it work for a while. a week later, my 3 year warranty expired and i am back to square one. my rotten lcd is going dark on me again. i believe i 've been taken for a ride. cos on the 4th hardware repair, i qualify for a brand new laptop under the no-lemon policy!!!!! and obviously they didnt want to spend money giving me a new laptop when my warranty was going to expire in a few days.

yesterday i spoke to toshiba again, and then confirmed it's a hardware problem!

any ideas ??

Jerry Lee Dec 11, 2003, 01:18pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Yes Scuz. You are absolutely correct. This problem is caused by being a bad Inverter Board. The inverter basically gives the backlight power to light up. These go out all the time. Fortunately they are inexpensive, it's just getting someone to fix it for you that can cost a bundle. :)

Bob Pfeiffer Dec 13, 2003, 03:03pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have this same problem with my satellite 1800. Has anyone ever changed an inverter in one of these.
Bob

Scuz Hakatak Dec 13, 2003, 03:09pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
It doesn't matter which model of laptop you have. Inverters are integral to most known LCD displays. If you have the same problem on your 1800, then changing the inverter will help. However, like I said, in my case, it works for a while and then it goes bust. Consequently, Toshiba also said, that reinstalling the restore CD on your laptop (the one that u get with a new laptop), may help. It resets/replaces system drivers to the factory settings. I would like to thy this on mine, only I no longer have the restore CD.

I have a feeling it's faulty design of some kind. Why would so many laptops have the same problem ? That too Toshiba ? Maybe over heating of some sort ruins the inverter..guessing wildly!

Bob Pfeiffer Dec 13, 2003, 03:32pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have done the restore, this causes a few problems;
1 you will have to reactivate windows with MS
2 I f you have office installed you will have to reinstall and reactivate
3 Backup any data you want to save, somethings will be there when you are done and some will be gone. Oh it did not help.

I have uninstalled the trident driver and rebooted, which seems to reinstall the driver many times, also does not help. Do you know where the inverter is located, body or display? I have found them for $65 and $50 canada.

Scuz Hakatak Dec 13, 2003, 03:38pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
nopes! i don't know where it is physically located in the laptop. besides, it might change for every laptop.

as far as buying inverters goes, u could check with toshiba or any local or online hardware sellers. i do not have any other specific information. all this is part of my last resort.

u might first want to get ur laptop checked by a professional. see what he says and then go ahead and try doing it yourself.

Bob Pfeiffer Dec 16, 2003, 10:00pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
A bit more info on the display blanking.
1 I have ordered a new inverter board, but I am not sure I need it

Here is what I have done in the last 2 days and have not had a failure yet.

Remove AC adaptor and battery before using this process, DANGEROUS VOLTAGES WILL BE PRESENT ON THE INVERTER BOARD IF POWERED ON!!!!!!!

AFTER OPENING THE DISPLAY, TOUCH A BARE METAL PART (HINGE WILL WORK) to discharge any static you have in your body. Do this each time you get up from your chair, static can destroy ckt boards.

The inverter in a 1800 is located in the display. To access it look at the bottom of the display on each outer edge, you will see 2 squares. They are tape. Remove these, if you want to reuse them to cover the screw holes set aside the are very sticky and will attach to anything that comes in contact with them and they will be lost, mine are gone.
After removing these screws, using a knife start at any corner and seperate the bezel from the body, use care there are fragile plastic clips attaching the bezel to the display. Once you have successfully raised a corner, release the rest of the bezel using a flat blade screw driver, again take time lift the bezel carefully and observe where the clips are and use the screw driver carefully, no real force should be needed, just insertining the tip and rotating it will release the clips. At the latch just look and you will see how to get around it, at the hinge (near the body) you will have to fold the display flat and use the screw driver to pry the bezel loose. REMEMBER NO FORCE THEY WILL RELEASE WITH EASE.

Now we have the bezel off, at the base of the display you will see a long circuit board mounted below the LCD this is the inverter. It has 1 screw holding it in place and a connector at each end.
To replace, remove the screw and connectors remove the board and replace in the reverse order. However before you buy a new board first try reseating the connectors and see if it fixes the problem. Reseating the connectors has corrected my problem for 2 days, to soon to say it is OK, but it is worth a try and now that you have gone this far you will be able to replace the board yourself. You can order a replacement board online (for a 1800) between $35 and $69. If you have a 1800 the toshiba part number is P000309130, the board may have U2031P01 on it but I have contacted vendors and the should be the same part.
To replace the bezel just position it over the body of the display and work your way around it pressing the clips back in place, again gently do not break the clips. Replace the screws and tape, if you still have them.
Replace the battery and turn on, GOOD LUCK

Bob Pfeiffer Dec 20, 2003, 10:12pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
It is now dec 20 and my display is still working. It looks lik reseating the inverter connectors may fix the problem. If anyone tries this please let me know if it works

Bob Pfeiffer Dec 20, 2003, 10:12pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
It is now dec 20 and my display is still working. It looks lik reseating the inverter connectors may fix the problem. If anyone tries this please let me know if it works

angel laguna Dec 27, 2003, 05:29pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Greetings

Bob, i have same problem with my laptop satellite 1800, i will apreciate if yous tell me where can i buy the inverter module, and how much does it cost..?

angel laguna

bert swinnen Dec 30, 2003, 07:51am EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Hi everyone,

I was having the same problems with my Satellite Pro 4600,
I've tried everything...upgraded the Bios, changed drivers, changed Bios settings... didn't help...

After a while I decided to open it and reseat every connector I found...didn't help...

But then !!! after opening the screenpanel (procedure described perfectly above), I found that the cable running from the base up to the LCD panel was only 3/4 seated in its connector.

!!!I found that just reseating the connector isn't enough, the cable is mounted to tight so if you open and close your lid a few times the connector is slightly unplugged and the problem starts all over again.
A sollution to this is to unscrew the clip which is 'holding' this cable, pull a little on the cable to make it a little longer (it's taped in a small loop so it's long enough), refit the clip, check the connector.
As an extra security measure you can tape the cable to the back of the panel to prevent it from moving when closing and opening the lid.

This sollution worked for me, I've got a smooth running T. SP 4600 now with a working LCD panel.

Maybe this info is usefull to some of you.

Greetings and a Happy New Year

Bert

Bob Pfeiffer Dec 30, 2003, 06:59pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I do have the sites anymore where I found the inverter. However do a search on the part number listed in my other e-mail and you will find places. There is a place in canada wher you can have it shipped for 50 US. I had ordered from it but cancled. The e-mail address is splitskull@hotmail.net.

ian wells Dec 31, 2003, 05:07am EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
Hi guys
I have the same problem with my ts 4600 i will try the cable sugestion above and let you know
thanks ian

ian wells Jan 01, 2004, 06:22am EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
hi again
i opened the case surounding the lcd and it didnt dropout after that also i need to mention the screen doesnt drop out while running a dvd .maybe this could be a overheating problem with the invertor.i notice also there are some air vents below where the lid attaches and that could also be venting hot air onto the lid case.
my fan doesnt work all the time is there a software control that turns it on or off

Bob Pfeiffer Jan 02, 2004, 10:41pm EST Reply - Quote - Report Abuse
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>> Re: Display problem with Toshiba Satellite Pro 4600
I have not studied the fan on the toshiba laptops, but they are usually mounted on the cpu to provide cooling. In a laptop power is limited by battery life, so the fans are turned only when needed to cool the cpu, and use the battery to it's max.
Note it is now 01 02 04 and reseating my inverter connectors is still working, no problems.
So anyone with this problem, before buying an inverter board, for $50 to $70, try the fix I described above.


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