I soldered ana chip & tightened gpu chip. after switching on the set green light appeared for 5/6 sec. changing to 2 red lights. 2nd time only red lights came . Now it's not turning on.

seems like capacitor problem, chack them and if thay have exploded replace them.

You may have tightened the screws to much. I had this happen to a RROD repair I performed. Worse case sinario is the gpu got fried. Did you clean the chips good and replace the thermal paste? A little trick I found is to take small pieces of a bank card/discount card and super glue them to the four corners of the chips. both cpu and gpu. when you remove the xclamps clean the chips until the have a mirror like finish. I used rubbing alcohol. Clean the heat syncs as well. Glue the plastic pieces to the corners of the chips. replace the syncs but dont tighten them all the way. While the console is disassembled plug in the av cable (to prevent all four red lights from coming on) plug in the power cord. Make sure the cooling fan is disconnected. Turn on the console. at this point you may still see the 3 red lights. This is o.k. Leave the console on for a while until the 3 red lights turn into 2 red lights. This means the console is overheating. Let it "cook" for 2 min. then tighten the screws. The overheat is needed to make the solder on the chips become plyable and alow the chips to be reset. you may still have a loose connection on the gpu causing the checkers.

if all four lights are red your av cable or hdmi is loose. if its 3 red lights this is the red ring of death (RROD) and it needs repair. microsoft has a 3year warrenty for this problem. what happens is the console gets hot and the "x" clamps holding the heat syncs to the chips bends the motherboard and causes the CPU or GPU to come loose enough to where they aren't making proper contact with the board. I've fixed several of these including 2 of my own. what you do is take it apart, remove the clamps and the heat syncs. clean the chips. apply new thernal paste and replace the problem causing clamps with screws and washers. plug in the xbox with out the fan hooked up for about 3-5 minutes until you see 2 red lights flashing which indicated the console is ovrheating, let it overheat for 2 minutes unplug it and tighten the screws. the overheating of the console softens the solder on the chips and allows you to tighten the back into place.

This is the video I watched to learn the process. Its part 1 of 9 i think">

When your console graphic start to tint shades
of green 100% of the time It's the loosing color
feed to the HANA / ANA ( scaler chip) unfortunately
the most reliable repair is to have the G.P.U. professionally re-flowed ( re-solder ) back to the
board and then securely clamp . This repair cost
between 60.00-80.00 depending on the warranty.

If you have any questions feel free to ask.

" Straight answers for honest questions"
Rob

It's not your TV or your cables or settings...
It the XBOX's G.P.U. chip has un-soldered itself
well specifically connection 428. the video feed to
the scalar ANA/HANA chip ,Killing your video.

What to do?
You have three options

1 Fix it your self (Standard X clamp mod for the G.P.U. only)
there are many video's on how to do this. If your motivated.
email me before you do and ill give you some little
trick that will get more mileage out of this type of repair.

2 Have a repair shop re-flow the G.P.U.and re clamp
the heat sink to the chip set ,and stress test it cost 80.00

3 Send it to Microsoft .they charge 99.00 to fix this problem

if you have any questions just email me.

Rob
[email protected]

It's a scaler chip problem (the "ANA" or "HANA" chip connected directly to the AV cable) in rare cases it is the GPU.

This is a serious issue that will need the attention of a skilled Microsoft tech. Contact Microsoft asap.

<a href="http://xbox-experts.com/errorcodes.php">http://xbox-experts.com/errorcodes.php</a> for the error code list <br /> <br /> e68 <br /> This error occurs when your harddrive is defective, it might still work sometimes.... It can also happen because of a bad eeprom or a wrong security sector.It can also be a problem with the internal connection of the harddrive to the mainboard...According to XBH: Hard drive not DMA configured<br /> <br /> <br /> e73 <br /> This error is caused by a cold solder joint under the GPU, (H)ANA-chip or in between.<br />Mostly it is one of the outer solder balls on the side facing the (H)ANA chip so a shim increases the chanced of success quite a bit.<br />Can also be a component that is missing or damaged so look for missing parts near the GPU and the (H)ANA chip.<br /> <br /> <br /> e79<br /> This error occurs when your harddrive is defective, it might still work sometimes....<br />There is also a small chance that it is a cold joint under the Southbridge causing problems with the I/O of the HDD.<br />It can also be related to wiring the diodes while JTAGGING.<br />Couldn't start xam.xex<br />

Read this very carefully. Turn off your ps3 from the back. Then turn it back on wait unit the light is red. Turn on the system through the front keep holding the power on. You will hear a beep one time that just tell you that the ps3 is powering on keep holding the button until you hear the second beep this will rest your video setting. If that dosnt work call me at sony

When you get the red ring, these things can happen. But u should get a error message or something. 
The specific type of hardware failure can be determined by a "hidden" error code

• Turn the xbox 360 on, and wait till the 3 red lights are flashing.
• Press and hold the sync up button (the small white one), while holding that button press the eject button.
• The LEDs will now blink the first number in the code (as described below).
• Release the eject button and press it again.
• The LEDs will now blink the second number of the code.
• Release the eject button and press it again.
• The LEDs will now blink the third number of the code.
• Release the eject button and press it again.
• The LEDs will now blink the forth number of the code.
• Release the eject button and press it again.
• The LEDs will go back to the 3 red flashing lights.

You should be able to determine the difference between the 3 flashing lights and the error code lights by the rate in which they flash.

Here is how you interpret the LEDs to get the code number:

• All four lights flashing - 0
• One light flashing - 1
• Two Lights flashing - 2
• Three lights flashing - 3

0001 power supply problem
0002 Network Interface problem
0003 Power problem could be the PSU could be the GPU/CPU, somehow the console isn't getting clean power from the power supply.
0010 There is a problem with the Southbridge Chip usually dealing with how it connects to the mainboard (cold solder joint/bridged solder joints)
0011 CPU over heating - If you are receiving this error after disassembling your console make sure to all 8 of the heatsinc screws are tightened securely to the board/heatsink holes.
0012 GPU over heating
0013 RAM over heating
0020 (Not yet known, possibly overheating)
0021 This can be caused by two completely different things either: 
A. DVD Drive Time out - Can be caused by problems with a firmware flash. This is also speculated to sometime be caused by a problem with the southbridge chipset on the motherboard based on how it connects to the DVD drive.
B. GPU error, generally caused by a poor connection to the mainboard (cold solder joints/bridged solder joints) See error 102 for more information
0022 CPU error, generally caused by a poor connection to the mainboard (cold solder joints/bridged solder joints). This can also be triggered by an error with the TSOP.
0023 (not yet known)
0030 Problem with temperature control
0031 (not yet known)
0032 (not yet known)
0033 (not yet known)
0100 (not yet known)
0101 (not yet known)
0102 Error in the "Digital Backbone" (CPU/GPU/RAM), this is usually caused by a cold solder joint between the GPU and the mainboard.
There are two theories to fixing this one deals with the "X" clamps that hold down the chips. The other involvesre-Heating the chips. DO NOT attempt either of these if your console is still under warranty. If your console is still under warranty return it to the store where it was purchased or call MS to have it replaced. 
[/list]0103 GPU Error this is usually caused by bridged solder points where the GPU connects to the mainboard. see error 0102 for more detailed information
0110 Ram error, this is caused by a cold or bridged solder joint on one of the Ram chips.
...
0200 (not yet known)
...
1000 Kernel can't be launched/signature in NAND Flash chip is broken! It could be possible after bad update.http://forums.xbox-scene.com/index.php?sho...p;#entry4156375 This might also be caused by a bad SATA cable.
1001 DVD Drive Error, either incorrect firmware or DVD Time out.
1002 DVD Drive Error, likely a firmware error, drive can eject, read, and write under windows but errors on console, replacing original firmware should fix issue.
1003 Hard Drive Error... It could be a problem with the Hard Drive itself or a problem with the internal connection to the hard drive, Try removing the hard drive and playing without it
1010 Hard Drive Error, Can be caused buy a corrupt or missing eProm. See also E68 above
1011 (not yet known)
1012 (not yet known)
1013 (not yet known) possibly a dashboard update error
1020 (not yet known)
1021 (not yet known)
1022 There is high chance it's a scaler chip problem (the "ANA" or "HANA" chip near the AV cable connection) it can also be caused by a faulty AV cable so check that first. In some cases it is a problem with the GPU and may be repairable by doing the x-clamp replacement (see error 0102)
1023 DVD drive not connected, connect DVD drive to boot
1030 This error deals with the Ethernet port's controller chip, a dead chip may not cause the error but removing the Ethernet controller chip does, it may also be caused by other Ethernet related problems.
1031 (not yet known)
1032 (not yet known)
1033 it could be cpu/gpu related or it could be psu related, not much info is known for sure.
...
1444 and up There is no "4" in the error codes four lights is a "0" go back and check your code again.


That should help That should help./

I have the same problem. I took the back off and it appears that the Green light has gone out. The TV will not run with out all three lights. I am looking for just the green light, but all I can find is the whole unit for almost what the tv cost.