Power Supply BN44-00158A with bad ICP801S but can't read its marking on this surface mount 8 pin chip, need it part number.

The Planar PX2210MW is notorious for bad electrolytic capacitors. Specifically capacitor C804 on the power supply board. . This is a 1000uF 25volt capacitor. That capacitor was usually made by Hermei and it was purple. Normally, the top of a capacitor will be flat. When it fails, it will be curved upward and there may be some brown material leaking out.
If the monitor still will not work after replacing C804, the problem could be Q805 or Q806. These are located on the under side of the board. They are small black surface mounted chips. There are 8 pins on these chips. I have seen both AO4620 and APM4548A part numbers used. These chips contain a pair of MOSFET transistors. One transistor is n-channel and the other is p-channel. Look for a short in one of the transistors. I have repaired several of these monitors. C804 is always bad. How ever, in three cases, Q805 or Q806 was also bad

Hi,

Is your laptop the V2000 or the M2000?

No standby power on these sets after a power loss is usually a bad IC at location U203 on the back of the power supply board. It's a Fairchild FAN6755 8-pin surface mount IC... A cheap, easy fix if you have basic soldering skills...

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,

http://en.wikipedia.org/wiki/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.

http://en.wikipedia.org/wiki/Ball_grid_array

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)

Regards,
joecoolvette

You did not supply a model number so can't narrow this down further. However it could be several things which may be:

1) The STK chips you used were defective.
2) When removing the original STK chips you also removed a surface mount resistor in the area
3) You have a fuse blown either on that board you did the work on or a power board
4) Check for good solder joints and make sure you didn't short out any pins to an adjacenent pin.

If I was to guess, I would say in order I would expect it to be item 3 above first, then 4, then 1 then 2.

TPH553 T568A T568BPin 1 - BL White/Green White/Orange Pin 2 - OR Green Orange Pin 3 - BK White/Orange White/Green Pin 4 - RD Blue Blue Pin 5 - GR White/Blue White/Blue Pin 6 - YL Orange Green Pin 7 - BR White/Brown White/Brown Pin 8 - WH Brown Brown
REF: wikipedia

This problem is almost never the actual fan itself failing..
The intermittent whine you hear is the result of the Mos-Fet fan driver chip which is the speed control current amplifier.
It's an 8 pin surface mount chip on the bottom of the main (lower) circuit board. This is a common failure with these projectors.
The chip is inexpensive and needs to be replaced by someone who is skilled in surface mount component technology. You can replace the fan but you will still have the same problem. Hint, the bad chip is not the one closest to the large fan connector... It's the one closest to the small fan connector and it will measure 45-60 ohm's between pins 7 and 8. the part (rns70d) is discontinued however there is a replacement that can be purchased at...

Power supply is easier to troubleshoot my local pc shop has used ones for $5 or if you have one laying around make sure you have one with the proper mobo connector 24pin will sometimes fit 20 pin as long as there are no transistors to close to plug just turn pc off unplug all drives and mobo plug in good supply and turn on if it works thats the problem if not probably mobo

I had the same problem on D610, it was not charging the battery and also the CPU speed was showing only the minimum 800Mhz though maximum was 2Ghz. I updated the bios (though it had the newest version) and ran intel chipset driver for D610. Viola! it set the speed to 2Ghz and the battery started charging. Was it a miracle or a solution I dont know!!!

Did the same and burnt a frazzled chip. it is on the 3rd circuit board (I believe it provides the lamp power). It is the 8 pin surface mount chip next to C900. As far as I can make out, the numbers on the chip are 4559 **** **7B I was told it's the lamp drive. If it is indeed lamp drive, then when you turn the monitor on, round the edges of a flashlight pressed to the screen, you should see a picture. If there isn't one, you may have killed more than I did. Is there no power regulator at the input? Good luck