Question about Cell Phones

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No power my cell phone was stock long time ago when i use to it no power i clean the board and same reaction no power bat. is good,..what kind of ic are defective of this?

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Cell phones wear out. Sorry, but you need a new one. Typically the ICs are custom and highly integrated is not reasonable posiblilty.

Posted on Nov 17, 2013

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Good news you are going to use the new phone.

Posted on Sep 14, 2014

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The time is come for using the second one.

Posted on Sep 14, 2014

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You just think about the second one.

Posted on Sep 14, 2014

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My Sony Ericsson Equinox (TM717) Phones is not working and all of a sudden got turned off and cannot able to turn it on again. Can you help me out please?


Check the battery of your cellphone because it maybe low bat. If the problem still exist after you recharge it. Buy a good new one to replace your old battery...
If the problem still exist. Your cellphone power IC is defective and need to replace it...

Sep 17, 2011 | Sony Ericsson Cell Phones

4 Answers

Toshiba CZ32V51 no vertical scan


that is a truly unhappy video controller. happen recently? looks like you're in for a new board replacement scenario.

vertical deflection amp is not getting the job done.

Feb 18, 2008 | Toshiba CZ32V51 32" TV

1 Answer

Cap placement on psm217-404-h-r power board with coresponding values picture would be nice


This power supply board is also used in Viewsonic VX2835W. The main problem are 4 bad/defective capacitors and shorted legs due to bleeding of soldering lead (brownish color).

1. 22uf 400v
2. 47uf 50v
3. 1uf 100v
4. 22uf 35v

You can find them near the PWM IC controller (U601). Replaced all these capacitors regardless they look good. I pulled them out off the board and tested them with my Blue ESR and capacitor tester and found 3 were defective.

Next, you need at least 97% Isoprophyl alcohol and toothbrush to clean the soldering paste. Due to overheating on the primary section / HOT section the soldering leads tend to produce brownish paste which is causing the component parts to SHORT. Concentrate at the back of the board, especially at the U102 (16-pin IC) and Q202 by scrubbing these IC and transistor carefully. I used magnifier to make sure the legs are clean and shiny. Clean the rest of the back and some part on top of the board. Let it dry for 2 hours at least. I did 2 times this cleaning to make process.

On my VX2835W main board has 2 bad capacitors at C124 and C126. I replaced them and cleaned also the board with alcohol.

That's it. Good Luck.

Roan Mac
Computer Tech
Chapel Hill, NC

Jun 25, 2011 | ViewSonic N3250W Television

1 Answer

Kindly help me with my problem about my lgkm555e. when i charge it the unit will become hot easily and the charging icon doesn't move at walang 5 minutes low bat na.


Battery draining fast?

Hi, most causes of battery cell running down very fast is because the problem is not from the battery, but from the cell phone it self.

Some times a phone will just start malfunctioning due to when something happens to a phone earlier and no action was taking during that particular period in time, it might make the cell phone to malfunction later on.

The problem of the phone is an IC chip inside on the board of the cell phone that has been damaged that is making the battery cell to discharge.
You will need to replace the IC inside the phone.

The more you don't repair the IC on time inside the phone,you will keep on buying more batteries.

To fix or replace the damaged IC, you can contact an expert on phone repair for help.it's a little bit technical to handle.

Hope it helped.

Thanks for using fixya..

May 28, 2011 | LG Cell Phones

3 Answers

Viewsonic VX2835wm won't turn on. Did the usual troubleshooting but to no avail. I have two others that work just fine. Any suggestions? Thanks!


There are 2 boards/parts involved with this problem

a) The power supply board:

The main problem are 4 bad/defective capacitors
1. 22uf 400v
2. 47uf 50v
3. 1uf 100v
4. 22uf 35v

You can find them near the PWM IC controller (U601). Replaced all these capacitors regardless they look good. I pulled them out off the board and tested them with my Blue ESR and capacitor tester and found 3 were defective.

Next, you need at least 97% Isoprophyl alcohol and toothbrush to clean the soldering paste. Due to overheating on the primary section / HOT section the soldering leads tend to produce brownish paste which is causing the component parts to SHORT. Concentrate at the back of the board, especially at the U102 (16-pin IC) and Q202 transistor by scrubbing them carefully. I used magnifier to make sure the legs are clean and shiny. Clean the rest of the back and some part on top of the board. Let it dry for 2 hours at least. I did 2 times this cleaning to complete the process.

b) The Main Board

The main board has 2 bad capacitors at C124 and C126. I replaced them and cleaned also the board with alcohol.

That's it. Good Luck.

Roan Mac
Computer Tech
Chapel Hill, NC

Aug 13, 2010 | ViewSonic VX2835wm Monitor

2 Answers

My motorola q 9m won't come back on


There might be two problem.
First, there is something wrong with your phone's power ic.
Second, it can be that your battery is damage.

**To make sure, remove the battery cover. Take out the battery. Clean you phone and the battery with a clean cloth (to get rid of dust). Now, re-insert the battery. Put back the cover and switch it on.

***If it won't switch on, you need to get a new battery or sent it to the shop to check it up.

Jan 29, 2010 | Cell Phones

1 Answer

My nokia 2100 is not getting on


Hi,

Your phone might have software or hardware problem , U can find out weather it is software problem by connecting it to a PC trying to flash it ( software installtion .
2, pls check the Bat state if is it having voltage 1, is it charging , using your Multimeter measure voltage from bat contact for 3.6 volts if nothing the phone has hardware problem eg Eprom chip , power IC is damaged.

Good luck dude



Jan 16, 2010 | Nokia 2100 Cellular Phone

1 Answer

My tv goes off by itself, after a while it comes back on. two days ago it went off and i cant get it back on


There is an IC in the TV that controls all functions; power on\off, volume, menu functions, etc.

When this IC losses power it will turn off the TV.

When this IC regains power it will restore the TV to the last Known condtion before the power was lost (OFF or ON)

It is possible that this IC is defective and has intermmitant power or functionality. This would result in this intermittant off and on and why you cannot power it on suddenly.

Also, be aware if the outlet that the TV is connected to losses power you could get this symptom (same if the outlet has a loose connection with the TV power cord)

overall point is:
1. Ensure the wall outlet is in good condition and the TV
2. the TV power supply could have some issue
3. if not 1 and 2, the TVs main board may be defective.

Jun 22, 2009 | Westinghouse LTV-32w1 32 in. HD-Ready LCD...

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