help error at oxoooooo chip=0x04 buffer =0x04

[victorpro]

hello
help with error programing winbond W39V040APZ,only read no can be burn chip

[Ezo]

Usually not found problem with error where chip and buffer contents are equal.
Try overwrite. What is error adress ?
Try erase and write again.
Clean chip contacts - plcc sidewards.

[victorpro]

bad chips bios?

[Ezo]

Erase chip. What is blank check result ?
Try program. It is again chip 0x04, buffer 0x04 (both equal values) ?
What SW do you apply ?

[victorpro]

in the ic 4 ,4503 pin nº 9 only 0 v

[Ezo]

Go Test H/W and measure and check signal changes (D3 or D7), check input pin10.

[victorpro]

D1 0K
D2 OK
D3 0V in off and ov in on
D4 OK
D5 OK
D6 OK
D7OK
pin 10 5v in off and 5v in on

[Ezo]

Test H/W D3. Check voltage changes DB25/5 and line to 4503/10

[victorpro]

DO2 in BU1 permanent with voltage
is port parallel in pc bad o damage?

[victorpro]

blank check
error at 0x000000 chip=0xF4 buffer=0x00

[victorpro]

Today probe the ezoflash connected to other mother board, and it has the same mistake.
It is not a problem of parallel port.
I go it makes again the ezoflash
I expect to be able to solve the problem
Thank you for his help
I go several months (8 months) and even it does not work
I do not speak English, excuses

[Ezo]

Test H/W D3. Check voltage changes DB25/5 and line to 4503/10.
Check no shorts.
Check parallel cable. Replace 4503

[victorpro]

If I activate 0E 24 in TETS H/W, BU/3 and BU1/5 appears 5 v, is normal this?
BU3/5 always with 5 v
Other cp in BU3 ok v

[victorpro]

If I activate 0E 24 in TETS H/W, BU/3 and BU1/5 appears 5 v, is normal this?
BU3/5 always with 5 v
Other cp in BU3 ok v
sorry,BU1/4 always v if activate OE 24 in TEST H/W its puts to 0v and in BU3/5 puts in 5 v
if activate and deactivate D3-17 in TEST H/W not change voltaje, always 5 v

[Ezo]

BU3/5 always with 5 v

Not normal.

Test H/W D3. Check voltage changes DB25/5 and line to 4503/10.
Check no shorts.

Here is no reply , voltage changes and 4503/10 !
----------------
Activate OE-24.
Activate / deactivate D3-17
Check voltage changes ( ~0 / ~5V) on following points BU1/5 , IC4 4503/10, IC4 4503/9, BU3/5.
Where is no more changes (like known BU3/5 now) ?
Here should be short or break line before failed point.