Question about Acer Aspire 5742Z-4200 Notebook

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Acer 5742 power on but only black screen no video on lcd cpu is hot but videeo chip is cool :(

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017


SOURCE: Laptop monitor goes black

does not recognize wireless allready has the sjid number and wep. what is the problem ?

Posted on Jan 09, 2008

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SOURCE: Screen stays black when powered on

Replaced my Acer 5570Z Aspire screen, had to replace the video cable also, the wires snapped after a year and a half of opening and closing it a LOT.

Posted on Jun 01, 2009

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SOURCE: black lcd screen

try to connect it to an external monitor to see if video card is working.
if yes, the the internal card/lcd screen connector may have become loose or your screen is broke.
you will have to remove some parts to check this.
before doing so, get the manual(paper or download) first and look where all the little screws are. if you know someone who can repair PC's he might help out if you let him...
it is a fiddly work but seeing a technician may be cost-intensive.
PLease decide yourself...

Posted on Aug 04, 2009

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SOURCE: Blank screen (Black) on Acer Aspire 9100, 2005 version, Laptop


Because you have tried it on an external monitor tells me it's nothing to do with screen, inverter or backlight.

This because if it was any of the above you would still get a display on the external monitor.

It's either one of two things: faulty memory or its not seated properly. check on the system memory, clean the contacts and slots and make sure you seat it properly. if you have more than one stick of memory installed take one out and rotate them one at a time turning the laptop on in between.

If you still get nothing on screen then chances are that the GPU (graphics processing unit) is shot.

Good luck.

Posted on Dec 04, 2009

  • 52 Answers

SOURCE: How do I connect my Acer Aspire 5742 to Sharp Aquos LCD TV

Which operating system? I know in XP I've had to set up a dual monitor screen before the OS will broadcast to the VGA/HDMI port.

Posted on Dec 31, 2011

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How do I tell my friend to fix his computer when he turns on the computer the screen is total black ?

There were many laptop video chips made a few years ago (millions made and sold HP, DELL, Lenovo, Toshiba, and many, many other laptop manufacturers sold them), w/ low temp (no lead) solder for years that caused the dreaded "Black Screen No Video" problems and issues, due to the chips cracking or desoldering by themselves due to heat buildups inside, and there were many common manufacturers that used said chips There was a small recall window after a massive class action lawsuit. (The solder reaches a certain fairly low temp, and the hundreds of solder balls crack between the chip and the mobo connections).

Can be repaired by special heating of the motherboard to resolder the chip and then gluing the chip to the board (the cheap fix, sometimes works, sometimes fails later)...or the correct fix of complete removal of the vid chip and resoldering or reballing w/ better high temp lead based solder. Or replacement of the motherboard itself w/ ATI chips if avail. (they never used that low temp solder to begin with it appears as I have never seen the problem rear it's head w/ an ATI vid chip yet, though I still install shims and other extra cooling on them too).....Plenty of choices for repair at e-bay, and youtube has many vids concerning the issue. (I have repaired thousands of laptops that showed the problem). Cheaper than a new laptop though. I always also install special aftermarket copper shims and cooling materials on all laptop units for both the vid chip(s), and the cpu chips to further help cool those units internally better than OEM heatsink cooling methods (amazing what copper shims, arctic silver and a few heat transfer cooling pads will do if properly installed. Cleaning out the unit by complete disassembly often really helps a lot too, just too much hot stuff all stuffed into too small a space, too much dust buildup...looks like a felt pad between the fan and the fan exhaust heatsink often on disassembly, and too much constant heat buildup inside the case causes those chips to overheat & desolder more times than not. Some units like HP dv7 Series also created a special BIOS file to turn on the cooling fan continuiously, so heating issues are much less frequent (if also cleaned out often enough), but that causes more continuous noise, especially if there is dust or that felt pad like buildup between the fan and the external heatsink. (Hair dust, carpet or blanket or clothing fibers).

To determine if it an LCD problem or Video chip problem, do the following firstly;

If the computer boots at all (turns on, you can hear the hard drive spin up, fans are on, no video still though, and the hard drive light seems to flash a lot like it is loading the OS normally...allow it to load fully until the HD light pretty much stops blinking. Use the FN key and the internal/external monitor button to see if the LCD comes on w/ video.....No? Then Turn it off. And then attempt to hook up an external monitor after shutting it down again (do not plug it into the laptop while it is running), using the blue 25 pin port on the laptop, then reboot again, and use the FN keyboard key after boot up, and the External/internal monitor keys again (one of the F keys usually around F5 or so...2 pics of screen/monitor together on 1 F key top of the keyboard), on the keyboard together to attempt to switch between the internal LCD screen and the now installed external monitor. (If he gets a picture on the screen using the external monitor, then the problem is not the actual video chip, but is a problem w/ the LCD screen of the laptop...Broken screen or damaged LCD cable, unplugged cable, bad backlight or LCD inverter, etc....But that can easily be replaced or fixed also).
If he still gets no picture on the external monitor, or on the LCD, it can be and usually is the dreaded vid chip black screen issue (or sometimes a failed CPU). That can also be fixed. I repair them often, motherboard needs removal and diagnosing. Some units though were later made w/ overtemp video shutdown if the fan does not cool immediately, and sometimes a simple thorough cleaning and re-assembly solves the issue. Some HP units (and others), have a diagnosing keyboard light flashing sequence on boot up (between the CAPS LOCK and the NUM PAD LOCK lights), that will diagnose a no start issue also, which can and should be done before any disassembly.....Some I have just replaced the CPU after diagnosing w/ those lights and the video comes right back. (Those few I actually thought were vid chip problems, but the light flash sequence said CPU failure...sure enough it was). And cheaper fixes too. ($17~$20 Used CPU's lots cheaper than a $125.00 motherboard vid chip reball +shipping).

If he wants professional help I repair and am quite reasonable. But I send out the motherboard for repair if that is actually necessary to someone who has a re-ball machine. Usually a new or repaired mobo is actually cheaper and faster if avail. on ebay for less.

I diagnose properly first before doing any of that. It is usually much cheaper than a new laptop and loss of that data though to simply repair the existing laptop and apply/install cooling shims to stop the problem from re-happening again. Extra cooling and proper cleaning does absolute wonders.

The make and model of the actual laptop helps determine what diagnosing features are available per the individual service manual and internal built in diagnosing features...Always include the info in a question off the laptop labels on the top & bottom of the unit, it looks like: *Each unit will be different specs. though.

Toshiba Satellite L455-S5975 Serial No. X9141XXXK Part No. PSLY0U-00VXX1 Service Tag: VNX756L
Windows 7 Home Premium 32-bit
Intel Celeron 900 2GB RAM, 250GB HDD, 15.6" HD Tru-Bright Display, Matte Silver (AMD/ATI/N-VIDIA) Video chipset.

All that info can usually be determined w/ the unit off by reading the labels and tags, and all the info is important to be able to research Black screen issues and all other issues.

If he decides not to fix that issue, that laptop is still worth much as individual parts (together whole or in pcs. sold 1 at a time fully disassembled. I personally buy lots of pcs. to fix other peoples laptops, and whole units each yr. to fix and then sell). ebay them do not shelve them. We always need lots of good used parts.

Good Luck.

Sep 29, 2014 | HP Computers & Internet

1 Answer

My Acer aspire 5742 was working perfectly until I picked it up by the lid and damaged the screen!!! My local computer repair people said they have installed a new screen but it is not working and now

That sucks. What happened to the screen the first time? Did you crack it? Did it just go black? There isn't alot of parts in there to go bad so if they replaced the screen then all you have left is the inverter which powers the backlight, and the video cable. If you can hold a flashlight at an angle against the screen and see a very faint picture, the inverter is bad. If you see nothing then either you got a bad screen or maybe you or the techs damaged the cable or bent the pins where the cable connects to the motherboard. Hope this helps! Btw I wouldn't take it back to them again lol.

Oct 27, 2012 | Acer Computers & Internet

1 Answer

Will not power up

Beep Codes Beep Code Description Failure Coverage 1 System Board: BIOS ROM failure System Board, covers BIOS corruption or ROM error 2 Memory No Memory / RAM detected 3 Chipset Error (North and South Bridge Chipset DMA/IMR/ Timer Error for Intel platform); Chipset Error System Board Chipset Failure Time-Of-Day Clock test failure. Gate A20 failure Super I/O chip failure Keyboard controller test failure. 4 RAM Read/Write failure Memory failure 5 RTC Power Fail. CMOS battery failure 6 Video BIOS Test Failure Video card / chip failure 7 CPU Cache Test Failure CPU failure 8 LCD LCD failure

Oct 13, 2012 | Dell Inspiron M5030 Laptop Computer 3D...

1 Answer

Why is my lap top just intermittently beeping with a black screen

Beep Codes Beep Code Description Failure Coverage 1 System Board: BIOS ROM failure System Board, covers BIOS corruption or ROM error 2 Memory No Memory / RAM detected 3 Chipset Error (North and South Bridge Chipset DMA/IMR/ Timer Error for Intel platform); Chipset Error System Board Chipset Failure Time-Of-Day Clock test failure. Gate A20 failure Super I/O chip failure Keyboard controller test failure. 4 RAM Read/Write failure Memory failure 5 RTC Power Fail. CMOS battery failure 6 Video BIOS Test Failure Video card / chip failure 7 CPU Cache Test Failure CPU failure 8 LCD LCD failure

Oct 07, 2012 | Dell Inspiron M5030 Laptop

1 Answer

Acer aspire 6930 Laptop screen suddenly flickers out of nowhere less than a year old.

Hi Guest,
Acer has really laxed in their products.
The problem is they have a poor air flow to keep the CPU and the Video Chip Cool. Chances are you blew you Video Chip.
If it is past the warrenty... Look on line for a new motherboard because you can't change the Video chip.
Look in your neighborhood for a good laptop tech who wood change the motherboard

Jul 10, 2010 | Computers & Internet

1 Answer

Monitor goes black

dry soldring problem in your monitor

Mar 31, 2009 | Acer AL1751WM (Silver) 17" LCD Monitor

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