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Losing backlight in about 3 seconds

I've found the problem to be at location Q-755, which is an SMD IC. The chip has been hot enough to melt the solder from the pads. I need to know the cross on the IC or where I can get one. The numbers are as follows:

This monitor is a Compaq D5064 (1720) LCD.
Would appreciate any help.


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Power problem take to techie

Posted on Jun 13, 2008


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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

A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Good luck!

Posted on Jan 02, 2017


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How do I reset the bios Password on a Panasonic Cf-51

This method may help;
1) Locate and remove the RTC battery
2) locate and remove the main battery and unplug power supply.
3) depress the power button for 30-60 seconds.
you do not have to solder anything to the board if there are posts ic 61,63 on MAIN PCB then just put a jumper across them while you power up. if its just 2 SMD pads just use a needle probe to arc the connection.

Oct 10, 2016 | Panasonic Toughbook CF-51 Notebook

1 Answer

T-con diagram

Hi Simba,
Generally there is no need of the diagram in AS15 colour disorder cases. It is 48 pin smd soldered on the TCON board. Try resoldering all the pins first. If it does not work simply replace the IC. I hope it helps.
Good Luck.

Mar 26, 2016 | Televison & Video

1 Answer

Insert sim card is found in low signal


First All Check:
1.Confirm whether same sim card is working in other h.s or not.
2.Make sure the sim slot is o.k. only try these two.
3.If all the above steps fails, check the SIM card connector pins for damage.
if so try to get serviced.
4.if ur sim card is good then it is problum form sim card ic u have u raplace it with SMD.
u can make it jumper mean u can fix this prob with out sim card is for this contact.
5.take sim connector slight up by pin then cheak by inserting sim. air gun on sim i.c. then cheak it.
Last Option:
IF make sure that the sim card hasn't been damamged at all sO Please You Go to Service
& Sim Office and Get the Duplicate Sim Same Your No From Office Oprator
Problem will Solved Quickly


First Option:
Phone in the Other Sim and check the Phone Network Signal If Network Signal Problem not Solved So
Secend Option:
Your Phone Network IC Fault So Please change Network IC
And Network Signal Problem will Solved
if it is there isn't much you can do on this side of the network.
Contact your phone company.

Jan 12, 2013 | Samsung GT C5130 Mobile

1 Answer

P50pdtv10a will not change channels stuck on channel 3

The system memory IC of your TV has damaged. This is one, which stores all the setting we have done with remote control, including channel memmory. This IC works in conjunction with the main system control IC. When we switch OFF or do any other adjustments with the tV, all the data will be stored in this IC, and tetreived from it to main system IC to process when we switch ON the TV. This is a non-volatile memory chip, ie, even the power is OFF, the data stored in it won't lost. This is a very small IC, can locate very near to main system control IC. Will have 8 solder terminals [normally], and ver cheap to buy too. Even though it is a very cheap and small one, the function of it in the circuit is great. In some Vizio sets, this IC will be of SMD [surface Mount Device] type, and on othere will be a DIL [Dual In Line] type pin confujuration. If your TVs memory is of first as stated above [SMD], replacing it will not be an easy job. If it is of second type, it can be replace easly.
Anyway, this is not a work that can be done without skill. If you have enough knldege in electronics, and have a concept of desoldering and soldering, have all soldering equipments with you, you can do this work by yourself at home. Otherwise you have to seek assistance from an experienced service technician. OK.

Oct 19, 2011 | Philips 60P8341 60" Rear Projection...

1 Answer

The laptop comes on but no pitchure on the screen

1) Use a flashlight, and shine it at the LCD screen of the Acer laptop at various angles.
Do you see faint images?

2) Laptop off you can also attach a VGA monitor (CRT. Looks like a small TV), to the VGA connector on the back of the laptop. Laptop on, press, and hold down on the Fn key, and press the Function key which toggles the graphics over to an external monitor. (Usually there is a icon on the key for this, on the keyboard)

Graphics present on external monitor?

If so you have a problem with the Inverter. (Screen Inverter)

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Much like the Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.
(Average Backlight size is half the thickness of a No.2 pencil, and 3 to 4 inches long)

An Inverter is used to convert the electricity coming from the laptop for the LCD screen, and the Backlight.

90 Percent of the time the fault is the Inverter.

The Inverter is located inside the Display Assembly.
[Display Assembly:
1) Top cover of laptop.

2) Display Bezel in the front of the LCD screen, and surrounds the outer front edge of the LCD screen. {Looks like a picture frame}

3) LCD screen

4) Web camera if this model has one.

5) Wireless Antenna

6) Inverter

7) Backlight

8) LCD screen metal frame, and hinges

9) Various screws ]

With the Display bezel removed the Inverter is located at the bottom middle, below the LCD screen.

{If I knew the Model Name, and Model Number of your Acer laptop I MAY be able to post a link to a free Service Manual for it}

If no faint images are seen, and/or an external monitor shows no graphics, there is a problem with the graphics chip on the motherboard.

Chip and Chipset are slang terms for I.C.
Integrated Circuit,

The graphics chip is mounted to the laptop motherboard via a BGA surface mount.

BGA surface mount:
To explain let me compare the older style of mounting Processors.

The older Processors have pins sticking out of the bottom. These pins lined up with socket holes in the Processor socket.

The Ball Grid Array type of surface mount has no pins on the chip. (In this case a graphics chip)
There are solder balls in place of the pins.

The area where the chip mounts to on the motherboard has copper pads.
The chip is lined up with the solder balls matching the copper pads.
Then heat is applied which melts the solder balls, and solders the chip to the copper pads.

If there is a poor cooling system for the graphics chip, the chip overheats, and the BGA surface mount becomes loosened.
The solder connections melt partially.
This creates a poor contact surface for the graphics chip to the motherboard, resulting in no graphics being shown on the LCD screen.

I await your findings with the flashlight, and/or external monitor. Would also like the Model Name, and Model Number. (Bottom of laptop)


Jun 26, 2011 | Acer Computers & Internet

2 Answers

I have white spots and black spots on right side of Mitsubishi WD-C657. I've done research online, and have heard its the dlp chip. Is that true, and if so, is it something that I can replace myself,...

This tv is it the DLP projection light engine block main board itself is the problems,not easily to go into the tv itself and replacing the IC chip itself.Must take out many mechanical parts to get u the Light engine block it self.U can replaced IC but somethime the IC chip it replaced,will not solved the problems,because the tv problems now the it is spreading and going on beyond the IC chip itself.If want to keep this tv very exspensive repair,i would reconmend hire a bound qualify tv tech replaced the whole Light projection block itself,but first call Mitsubishi for some kind of deal,they might help with the repair amount cost.

May 13, 2011 | Mitsubishi WD-C657 65" HDTV

1 Answer

Acer 5536 shows only black screen and does not go to vista mode

The problem is with the video chip of the laptop. for fixing it you need to reball the IC or you can do a trick. 1. Open the motherboard. 2. Pull out heat sink 3. search for nvidia display chip 4. heat the chip with heat torch or SMD soldering gun
Boot It.

Feb 08, 2011 | Acer Aspire 5536-5224 Notebook

2 Answers

No power -- TV will not turn on

This could be the power supply baord / Bad Caps/ They will be puffed up..
Or if the inverter board is bad** Inverter board lights the backlights.

Oct 30, 2008 | Vizio L32 32 in. LCD HDTV

2 Answers

Toshibba laptop a135-s2276 ,my mother bords smd chip does not work so display of screen does not appear

The problem is well known witht this model Toshiba - the problem is the fan stops working and then hence shuts down to prevent overheating - it does not take long once the laptop is hot. Without replacing the fan just reboot the laptop until you hear the fan start again on reboot.

Oct 15, 2008 | Intel Motherboard

1 Answer

Replaced IC chips and fried something

1)WHICH chips?? 2)Which resistors? (locations) 3)It is worth it. 4)Possible,but usually not needed.

Sep 19, 2007 | Panasonic PT-53WX54 53" Rear Projection...

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